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Finding the Fourth Proportional to 71,931,907.80, 107,897,861.70 and 26,487,797.40

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Solution

The fourth proportional to 71,931,907.80, 107,897,861.70 and 26,487,797.40 is: 39,731,696.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,931,907.80 : 107,897,861.70 = 26,487,797.40 : x
  2. Step 2: Convert to fraction form
    71,931,907.80/107,897,861.70 = 26,487,797.40/x
  3. Step 3: Cross multiply
    71,931,907.80x = 107,897,861.70 × 26,487,797.40
  4. Step 4: Simplify right side
    71,931,907.80x = 2,857,976,700,602,819.50
  5. Step 5: Solve for x
    x = 2,857,976,700,602,819.50/71,931,907.80
  6. Step 6: Final answer
    x = 39,731,696.10

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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.