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Finding the Fourth Proportional to 157,656.48, 217,564.08 and 86,037.72

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Solution

The fourth proportional to 157,656.48, 217,564.08 and 86,037.72 is: 118,731.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,656.48 : 217,564.08 = 86,037.72 : x
  2. Step 2: Convert to fraction form
    157,656.48/217,564.08 = 86,037.72/x
  3. Step 3: Cross multiply
    157,656.48x = 217,564.08 × 86,037.72
  4. Step 4: Simplify right side
    157,656.48x = 18,718,717,397.10
  5. Step 5: Solve for x
    x = 18,718,717,397.10/157,656.48
  6. Step 6: Final answer
    x = 118,731.04

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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.