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Finding the Fourth Proportional to 78,894,165.80, 118,341,248.70 and 21,386,344.70

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Solution

The fourth proportional to 78,894,165.80, 118,341,248.70 and 21,386,344.70 is: 32,079,517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,894,165.80 : 118,341,248.70 = 21,386,344.70 : x
  2. Step 2: Convert to fraction form
    78,894,165.80/118,341,248.70 = 21,386,344.70/x
  3. Step 3: Cross multiply
    78,894,165.80x = 118,341,248.70 × 21,386,344.70
  4. Step 4: Simplify right side
    78,894,165.80x = 2,530,886,736,926,627
  5. Step 5: Solve for x
    x = 2,530,886,736,926,627/78,894,165.80
  6. Step 6: Final answer
    x = 32,079,517.05

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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.