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Finding the Fourth Proportional to 239,886.40, 359,872.80 and 99,659.20

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Solution

The fourth proportional to 239,886.40, 359,872.80 and 99,659.20 is: 149,506.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,886.40 : 359,872.80 = 99,659.20 : x
  2. Step 2: Convert to fraction form
    239,886.40/359,872.80 = 99,659.20/x
  3. Step 3: Cross multiply
    239,886.40x = 359,872.80 × 99,659.20
  4. Step 4: Simplify right side
    239,886.40x = 35,864,635,349.76
  5. Step 5: Solve for x
    x = 35,864,635,349.76/239,886.40
  6. Step 6: Final answer
    x = 149,506.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.