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Finding the Fourth Proportional to 71,898.57, 99,190.80 and 47,710.94

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Solution

The fourth proportional to 71,898.57, 99,190.80 and 47,710.94 is: 65,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,898.57 : 99,190.80 = 47,710.94 : x
  2. Step 2: Convert to fraction form
    71,898.57/99,190.80 = 47,710.94/x
  3. Step 3: Cross multiply
    71,898.57x = 99,190.80 × 47,710.94
  4. Step 4: Simplify right side
    71,898.57x = 4,732,485,811.40
  5. Step 5: Solve for x
    x = 4,732,485,811.40/71,898.57
  6. Step 6: Final answer
    x = 65,821.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.