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Finding the Fourth Proportional to 125,341.88, 172,874.04 and 77,621.72

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Solution

The fourth proportional to 125,341.88, 172,874.04 and 77,621.72 is: 107,057.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,341.88 : 172,874.04 = 77,621.72 : x
  2. Step 2: Convert to fraction form
    125,341.88/172,874.04 = 77,621.72/x
  3. Step 3: Cross multiply
    125,341.88x = 172,874.04 × 77,621.72
  4. Step 4: Simplify right side
    125,341.88x = 13,418,780,328.15
  5. Step 5: Solve for x
    x = 13,418,780,328.15/125,341.88
  6. Step 6: Final answer
    x = 107,057.44

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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.