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Finding the Fourth Proportional to 78,894,335.80, 118,341,503.70 and 21,386,514.70

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Solution

The fourth proportional to 78,894,335.80, 118,341,503.70 and 21,386,514.70 is: 32,079,772.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,894,335.80 : 118,341,503.70 = 21,386,514.70 : x
  2. Step 2: Convert to fraction form
    78,894,335.80/118,341,503.70 = 21,386,514.70/x
  3. Step 3: Cross multiply
    78,894,335.80x = 118,341,503.70 × 21,386,514.70
  4. Step 4: Simplify right side
    78,894,335.80x = 2,530,912,308,500,154.50
  5. Step 5: Solve for x
    x = 2,530,912,308,500,154.50/78,894,335.80
  6. Step 6: Final answer
    x = 32,079,772.05

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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.