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Finding the Fourth Proportional to 71,994,938.20, 107,992,407.30 and 57,646,031.20

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Solution

The fourth proportional to 71,994,938.20, 107,992,407.30 and 57,646,031.20 is: 86,469,046.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994,938.20 : 107,992,407.30 = 57,646,031.20 : x
  2. Step 2: Convert to fraction form
    71,994,938.20/107,992,407.30 = 57,646,031.20/x
  3. Step 3: Cross multiply
    71,994,938.20x = 107,992,407.30 × 57,646,031.20
  4. Step 4: Simplify right side
    71,994,938.20x = 6,225,333,680,578,908
  5. Step 5: Solve for x
    x = 6,225,333,680,578,908/71,994,938.20
  6. Step 6: Final answer
    x = 86,469,046.80

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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.