Home / 81,069.40-121,567.65-31,132.90

Finding the Fourth Proportional to 81,069.40, 121,567.65 and 31,132.90

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Solution

The fourth proportional to 81,069.40, 121,567.65 and 31,132.90 is: 46,685.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,069.40 : 121,567.65 = 31,132.90 : x
  2. Step 2: Convert to fraction form
    81,069.40/121,567.65 = 31,132.90/x
  3. Step 3: Cross multiply
    81,069.40x = 121,567.65 × 31,132.90
  4. Step 4: Simplify right side
    81,069.40x = 3,784,753,490.69
  5. Step 5: Solve for x
    x = 3,784,753,490.69/81,069.40
  6. Step 6: Final answer
    x = 46,685.35

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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.