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Finding the Fourth Proportional to 138,915.42, 191,704.20 and 75,253.18

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Solution

The fourth proportional to 138,915.42, 191,704.20 and 75,253.18 is: 103,849.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,915.42 : 191,704.20 = 75,253.18 : x
  2. Step 2: Convert to fraction form
    138,915.42/191,704.20 = 75,253.18/x
  3. Step 3: Cross multiply
    138,915.42x = 191,704.20 × 75,253.18
  4. Step 4: Simplify right side
    138,915.42x = 14,426,350,669.36
  5. Step 5: Solve for x
    x = 14,426,350,669.36/138,915.42
  6. Step 6: Final answer
    x = 103,849.89

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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.