Home / 91,985.10-137,977.65-74,489.10

Finding the Fourth Proportional to 91,985.10, 137,977.65 and 74,489.10

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Solution

The fourth proportional to 91,985.10, 137,977.65 and 74,489.10 is: 111,733.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,985.10 : 137,977.65 = 74,489.10 : x
  2. Step 2: Convert to fraction form
    91,985.10/137,977.65 = 74,489.10/x
  3. Step 3: Cross multiply
    91,985.10x = 137,977.65 × 74,489.10
  4. Step 4: Simplify right side
    91,985.10x = 10,277,830,968.62
  5. Step 5: Solve for x
    x = 10,277,830,968.62/91,985.10
  6. Step 6: Final answer
    x = 111,733.65

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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.