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Finding the Fourth Proportional to 125,156.16, 172,680.84 and 71,421.84

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Solution

The fourth proportional to 125,156.16, 172,680.84 and 71,421.84 is: 98,542.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,156.16 : 172,680.84 = 71,421.84 : x
  2. Step 2: Convert to fraction form
    125,156.16/172,680.84 = 71,421.84/x
  3. Step 3: Cross multiply
    125,156.16x = 172,680.84 × 71,421.84
  4. Step 4: Simplify right side
    125,156.16x = 12,333,183,325.55
  5. Step 5: Solve for x
    x = 12,333,183,325.55/125,156.16
  6. Step 6: Final answer
    x = 98,542.36

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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.