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Finding the Fourth Proportional to 135,672.90, 187,239.80 and 75,263.02

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Solution

The fourth proportional to 135,672.90, 187,239.80 and 75,263.02 is: 103,869.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,672.90 : 187,239.80 = 75,263.02 : x
  2. Step 2: Convert to fraction form
    135,672.90/187,239.80 = 75,263.02/x
  3. Step 3: Cross multiply
    135,672.90x = 187,239.80 × 75,263.02
  4. Step 4: Simplify right side
    135,672.90x = 14,092,232,812.20
  5. Step 5: Solve for x
    x = 14,092,232,812.20/135,672.90
  6. Step 6: Final answer
    x = 103,869.18

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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.