Home / 121,117,419.20-181,676,128.80-72,744,478.40

Finding the Fourth Proportional to 121,117,419.20, 181,676,128.80 and 72,744,478.40

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Solution

The fourth proportional to 121,117,419.20, 181,676,128.80 and 72,744,478.40 is: 109,116,717.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,117,419.20 : 181,676,128.80 = 72,744,478.40 : x
  2. Step 2: Convert to fraction form
    121,117,419.20/181,676,128.80 = 72,744,478.40/x
  3. Step 3: Cross multiply
    121,117,419.20x = 181,676,128.80 × 72,744,478.40
  4. Step 4: Simplify right side
    121,117,419.20x = 13,215,935,227,287,220
  5. Step 5: Solve for x
    x = 13,215,935,227,287,220/121,117,419.20
  6. Step 6: Final answer
    x = 109,116,717.60

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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.