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Finding the Fourth Proportional to 124,689.60, 172,028.96 and 70,961.16

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Solution

The fourth proportional to 124,689.60, 172,028.96 and 70,961.16 is: 97,902.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,689.60 : 172,028.96 = 70,961.16 : x
  2. Step 2: Convert to fraction form
    124,689.60/172,028.96 = 70,961.16/x
  3. Step 3: Cross multiply
    124,689.60x = 172,028.96 × 70,961.16
  4. Step 4: Simplify right side
    124,689.60x = 12,207,375,510.76
  5. Step 5: Solve for x
    x = 12,207,375,510.76/124,689.60
  6. Step 6: Final answer
    x = 97,902.11

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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.