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Finding the Fourth Proportional to 125,025.78, 172,492.86 and 71,272.04

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Solution

The fourth proportional to 125,025.78, 172,492.86 and 71,272.04 is: 98,331.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,025.78 : 172,492.86 = 71,272.04 : x
  2. Step 2: Convert to fraction form
    125,025.78/172,492.86 = 71,272.04/x
  3. Step 3: Cross multiply
    125,025.78x = 172,492.86 × 71,272.04
  4. Step 4: Simplify right side
    125,025.78x = 12,293,918,017.63
  5. Step 5: Solve for x
    x = 12,293,918,017.63/125,025.78
  6. Step 6: Final answer
    x = 98,331.06

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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.