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Finding the Fourth Proportional to 125,305.64, 172,925.20 and 71,599.40

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Solution

The fourth proportional to 125,305.64, 172,925.20 and 71,599.40 is: 98,809.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,305.64 : 172,925.20 = 71,599.40 : x
  2. Step 2: Convert to fraction form
    125,305.64/172,925.20 = 71,599.40/x
  3. Step 3: Cross multiply
    125,305.64x = 172,925.20 × 71,599.40
  4. Step 4: Simplify right side
    125,305.64x = 12,381,340,564.88
  5. Step 5: Solve for x
    x = 12,381,340,564.88/125,305.64
  6. Step 6: Final answer
    x = 98,809.12

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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.