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Finding the Fourth Proportional to 239,648.86, 330,754.20 and 142,864.59

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Solution

The fourth proportional to 239,648.86, 330,754.20 and 142,864.59 is: 197,176.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,648.86 : 330,754.20 = 142,864.59 : x
  2. Step 2: Convert to fraction form
    239,648.86/330,754.20 = 142,864.59/x
  3. Step 3: Cross multiply
    239,648.86x = 330,754.20 × 142,864.59
  4. Step 4: Simplify right side
    239,648.86x = 47,253,063,173.78
  5. Step 5: Solve for x
    x = 47,253,063,173.78/239,648.86
  6. Step 6: Final answer
    x = 197,176.25

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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.