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Finding the Fourth Proportional to 125,118.63, 172,676.13 and 71,411.76

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Solution

The fourth proportional to 125,118.63, 172,676.13 and 71,411.76 is: 98,555.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,118.63 : 172,676.13 = 71,411.76 : x
  2. Step 2: Convert to fraction form
    125,118.63/172,676.13 = 71,411.76/x
  3. Step 3: Cross multiply
    125,118.63x = 172,676.13 × 71,411.76
  4. Step 4: Simplify right side
    125,118.63x = 12,331,106,353.29
  5. Step 5: Solve for x
    x = 12,331,106,353.29/125,118.63
  6. Step 6: Final answer
    x = 98,555.32

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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.