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Finding the Fourth Proportional to 157,667.52, 217,563.36 and 90,621.12

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Solution

The fourth proportional to 157,667.52, 217,563.36 and 90,621.12 is: 125,046.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,667.52 : 217,563.36 = 90,621.12 : x
  2. Step 2: Convert to fraction form
    157,667.52/217,563.36 = 90,621.12/x
  3. Step 3: Cross multiply
    157,667.52x = 217,563.36 × 90,621.12
  4. Step 4: Simplify right side
    157,667.52x = 19,715,835,354.16
  5. Step 5: Solve for x
    x = 19,715,835,354.16/157,667.52
  6. Step 6: Final answer
    x = 125,046.90

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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.