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Finding the Fourth Proportional to 138,915.64, 191,703.40 and 75,253.69

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Solution

The fourth proportional to 138,915.64, 191,703.40 and 75,253.69 is: 103,849.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,915.64 : 191,703.40 = 75,253.69 : x
  2. Step 2: Convert to fraction form
    138,915.64/191,703.40 = 75,253.69/x
  3. Step 3: Cross multiply
    138,915.64x = 191,703.40 × 75,253.69
  4. Step 4: Simplify right side
    138,915.64x = 14,426,388,235.55
  5. Step 5: Solve for x
    x = 14,426,388,235.55/138,915.64
  6. Step 6: Final answer
    x = 103,849.99

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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.