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Finding the Fourth Proportional to 71,977.86, 99,278.02 and 62,400.62

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Solution

The fourth proportional to 71,977.86, 99,278.02 and 62,400.62 is: 86,068.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,977.86 : 99,278.02 = 62,400.62 : x
  2. Step 2: Convert to fraction form
    71,977.86/99,278.02 = 62,400.62/x
  3. Step 3: Cross multiply
    71,977.86x = 99,278.02 × 62,400.62
  4. Step 4: Simplify right side
    71,977.86x = 6,195,010,000.37
  5. Step 5: Solve for x
    x = 6,195,010,000.37/71,977.86
  6. Step 6: Final answer
    x = 86,068.27

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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.