Home / 121,285.90-181,864.05-42,402.70

Finding the Fourth Proportional to 121,285.90, 181,864.05 and 42,402.70

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Solution

The fourth proportional to 121,285.90, 181,864.05 and 42,402.70 is: 63,581.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,285.90 : 181,864.05 = 42,402.70 : x
  2. Step 2: Convert to fraction form
    121,285.90/181,864.05 = 42,402.70/x
  3. Step 3: Cross multiply
    121,285.90x = 181,864.05 × 42,402.70
  4. Step 4: Simplify right side
    121,285.90x = 7,711,526,752.94
  5. Step 5: Solve for x
    x = 7,711,526,752.94/121,285.90
  6. Step 6: Final answer
    x = 63,581.40

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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.