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Finding the Fourth Proportional to 125,133.98, 172,687.67 and 71,417.91

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Solution

The fourth proportional to 125,133.98, 172,687.67 and 71,417.91 is: 98,558.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,133.98 : 172,687.67 = 71,417.91 : x
  2. Step 2: Convert to fraction form
    125,133.98/172,687.67 = 71,417.91/x
  3. Step 3: Cross multiply
    125,133.98x = 172,687.67 × 71,417.91
  4. Step 4: Simplify right side
    125,133.98x = 12,332,992,652.71
  5. Step 5: Solve for x
    x = 12,332,992,652.71/125,133.98
  6. Step 6: Final answer
    x = 98,558.31

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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.