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Finding the Fourth Proportional to 162,987.56, 224,924.49 and 90,391.88

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Solution

The fourth proportional to 162,987.56, 224,924.49 and 90,391.88 is: 124,741.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,987.56 : 224,924.49 = 90,391.88 : x
  2. Step 2: Convert to fraction form
    162,987.56/224,924.49 = 90,391.88/x
  3. Step 3: Cross multiply
    162,987.56x = 224,924.49 × 90,391.88
  4. Step 4: Simplify right side
    162,987.56x = 20,331,346,384.52
  5. Step 5: Solve for x
    x = 20,331,346,384.52/162,987.56
  6. Step 6: Final answer
    x = 124,741.71

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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.