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Finding the Fourth Proportional to 157,317.12, 217,095.12 and 85,698

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Solution

The fourth proportional to 157,317.12, 217,095.12 and 85,698 is: 118,261.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,317.12 : 217,095.12 = 85,698 : x
  2. Step 2: Convert to fraction form
    157,317.12/217,095.12 = 85,698/x
  3. Step 3: Cross multiply
    157,317.12x = 217,095.12 × 85,698
  4. Step 4: Simplify right side
    157,317.12x = 18,604,617,593.76
  5. Step 5: Solve for x
    x = 18,604,617,593.76/157,317.12
  6. Step 6: Final answer
    x = 118,261.88

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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.