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Finding the Fourth Proportional to 69,013,420.80, 103,432,213.80 and 36,680,812.80

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Solution

The fourth proportional to 69,013,420.80, 103,432,213.80 and 36,680,812.80 is: 54,974,490.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,013,420.80 : 103,432,213.80 = 36,680,812.80 : x
  2. Step 2: Convert to fraction form
    69,013,420.80/103,432,213.80 = 36,680,812.80/x
  3. Step 3: Cross multiply
    69,013,420.80x = 103,432,213.80 × 36,680,812.80
  4. Step 4: Simplify right side
    69,013,420.80x = 3,793,977,671,887,376
  5. Step 5: Solve for x
    x = 3,793,977,671,887,376/69,013,420.80
  6. Step 6: Final answer
    x = 54,974,490.87

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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.