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Finding the Fourth Proportional to 98,659.72, 136,154.10 and 56,217.16

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Solution

The fourth proportional to 98,659.72, 136,154.10 and 56,217.16 is: 77,581.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,659.72 : 136,154.10 = 56,217.16 : x
  2. Step 2: Convert to fraction form
    98,659.72/136,154.10 = 56,217.16/x
  3. Step 3: Cross multiply
    98,659.72x = 136,154.10 × 56,217.16
  4. Step 4: Simplify right side
    98,659.72x = 7,654,196,824.36
  5. Step 5: Solve for x
    x = 7,654,196,824.36/98,659.72
  6. Step 6: Final answer
    x = 77,581.78

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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.