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Finding the Fourth Proportional to 71,854.57, 99,159.95 and 45,012.79

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Solution

The fourth proportional to 71,854.57, 99,159.95 and 45,012.79 is: 62,118.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,854.57 : 99,159.95 = 45,012.79 : x
  2. Step 2: Convert to fraction form
    71,854.57/99,159.95 = 45,012.79/x
  3. Step 3: Cross multiply
    71,854.57x = 99,159.95 × 45,012.79
  4. Step 4: Simplify right side
    71,854.57x = 4,463,465,710.16
  5. Step 5: Solve for x
    x = 4,463,465,710.16/71,854.57
  6. Step 6: Final answer
    x = 62,118.05

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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.