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Finding the Fourth Proportional to 125,175.52, 172,749.14 and 71,477.79

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Solution

The fourth proportional to 125,175.52, 172,749.14 and 71,477.79 is: 98,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,175.52 : 172,749.14 = 71,477.79 : x
  2. Step 2: Convert to fraction form
    125,175.52/172,749.14 = 71,477.79/x
  3. Step 3: Cross multiply
    125,175.52x = 172,749.14 × 71,477.79
  4. Step 4: Simplify right side
    125,175.52x = 12,347,726,751.60
  5. Step 5: Solve for x
    x = 12,347,726,751.60/125,175.52
  6. Step 6: Final answer
    x = 98,643.30

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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.