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Finding the Fourth Proportional to 121,270.60, 181,862.70 and 42,387.40

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Solution

The fourth proportional to 121,270.60, 181,862.70 and 42,387.40 is: 63,566.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,270.60 : 181,862.70 = 42,387.40 : x
  2. Step 2: Convert to fraction form
    121,270.60/181,862.70 = 42,387.40/x
  3. Step 3: Cross multiply
    121,270.60x = 181,862.70 × 42,387.40
  4. Step 4: Simplify right side
    121,270.60x = 7,708,687,009.98
  5. Step 5: Solve for x
    x = 7,708,687,009.98/121,270.60
  6. Step 6: Final answer
    x = 63,566.00

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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.