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Finding the Fourth Proportional to 157,962.62, 217,989.89 and 89,978.61

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Solution

The fourth proportional to 157,962.62, 217,989.89 and 89,978.61 is: 124,171.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,962.62 : 217,989.89 = 89,978.61 : x
  2. Step 2: Convert to fraction form
    157,962.62/217,989.89 = 89,978.61/x
  3. Step 3: Cross multiply
    157,962.62x = 217,989.89 × 89,978.61
  4. Step 4: Simplify right side
    157,962.62x = 19,614,426,846.36
  5. Step 5: Solve for x
    x = 19,614,426,846.36/157,962.62
  6. Step 6: Final answer
    x = 124,171.32

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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.