Home / 91,729.20-137,593.80-77,732.40

Finding the Fourth Proportional to 91,729.20, 137,593.80 and 77,732.40

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Solution

The fourth proportional to 91,729.20, 137,593.80 and 77,732.40 is: 116,598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,729.20 : 137,593.80 = 77,732.40 : x
  2. Step 2: Convert to fraction form
    91,729.20/137,593.80 = 77,732.40/x
  3. Step 3: Cross multiply
    91,729.20x = 137,593.80 × 77,732.40
  4. Step 4: Simplify right side
    91,729.20x = 10,695,496,299.12
  5. Step 5: Solve for x
    x = 10,695,496,299.12/91,729.20
  6. Step 6: Final answer
    x = 116,598.60

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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.