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Finding the Fourth Proportional to 94,644,019.20, 141,966,028.80 and 78,488,212.80

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Solution

The fourth proportional to 94,644,019.20, 141,966,028.80 and 78,488,212.80 is: 117,732,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,644,019.20 : 141,966,028.80 = 78,488,212.80 : x
  2. Step 2: Convert to fraction form
    94,644,019.20/141,966,028.80 = 78,488,212.80/x
  3. Step 3: Cross multiply
    94,644,019.20x = 141,966,028.80 × 78,488,212.80
  4. Step 4: Simplify right side
    94,644,019.20x = 11,142,659,878,825,330
  5. Step 5: Solve for x
    x = 11,142,659,878,825,330/94,644,019.20
  6. Step 6: Final answer
    x = 117,732,319.20

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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.