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Finding the Fourth Proportional to 71,143.80, 106,715.70 and 70,625.40

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Solution

The fourth proportional to 71,143.80, 106,715.70 and 70,625.40 is: 105,938.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,143.80 : 106,715.70 = 70,625.40 : x
  2. Step 2: Convert to fraction form
    71,143.80/106,715.70 = 70,625.40/x
  3. Step 3: Cross multiply
    71,143.80x = 106,715.70 × 70,625.40
  4. Step 4: Simplify right side
    71,143.80x = 7,536,838,998.78
  5. Step 5: Solve for x
    x = 7,536,838,998.78/71,143.80
  6. Step 6: Final answer
    x = 105,938.10

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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.