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Finding the Fourth Proportional to 125,113.73, 172,669.37 and 71,406.89

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Solution

The fourth proportional to 125,113.73, 172,669.37 and 71,406.89 is: 98,548.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,113.73 : 172,669.37 = 71,406.89 : x
  2. Step 2: Convert to fraction form
    125,113.73/172,669.37 = 71,406.89/x
  3. Step 3: Cross multiply
    125,113.73x = 172,669.37 × 71,406.89
  4. Step 4: Simplify right side
    125,113.73x = 12,329,781,489.58
  5. Step 5: Solve for x
    x = 12,329,781,489.58/125,113.73
  6. Step 6: Final answer
    x = 98,548.59

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1.5x scale

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.