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Finding the Fourth Proportional to 91,173, 125,823.60 and 53,459.40

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Solution

The fourth proportional to 91,173, 125,823.60 and 53,459.40 is: 73,776.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,173 : 125,823.60 = 53,459.40 : x
  2. Step 2: Convert to fraction form
    91,173/125,823.60 = 53,459.40/x
  3. Step 3: Cross multiply
    91,173x = 125,823.60 × 53,459.40
  4. Step 4: Simplify right side
    91,173x = 6,726,454,161.84
  5. Step 5: Solve for x
    x = 6,726,454,161.84/91,173
  6. Step 6: Final answer
    x = 73,776.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.