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Finding the Fourth Proportional to 91,459.40, 137,185.81 and 23,990.90

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Solution

The fourth proportional to 91,459.40, 137,185.81 and 23,990.90 is: 35,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,459.40 : 137,185.81 = 23,990.90 : x
  2. Step 2: Convert to fraction form
    91,459.40/137,185.81 = 23,990.90/x
  3. Step 3: Cross multiply
    91,459.40x = 137,185.81 × 23,990.90
  4. Step 4: Simplify right side
    91,459.40x = 3,291,211,049.13
  5. Step 5: Solve for x
    x = 3,291,211,049.13/91,459.40
  6. Step 6: Final answer
    x = 35,985.49

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.