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Finding the Fourth Proportional to 124,679.62, 172,114.53 and 79,419.66

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Solution

The fourth proportional to 124,679.62, 172,114.53 and 79,419.66 is: 109,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,679.62 : 172,114.53 = 79,419.66 : x
  2. Step 2: Convert to fraction form
    124,679.62/172,114.53 = 79,419.66/x
  3. Step 3: Cross multiply
    124,679.62x = 172,114.53 × 79,419.66
  4. Step 4: Simplify right side
    124,679.62x = 13,669,276,510.41
  5. Step 5: Solve for x
    x = 13,669,276,510.41/124,679.62
  6. Step 6: Final answer
    x = 109,635.21

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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.