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Finding the Fourth Proportional to 157,330.80, 217,118.85 and 85,710.80

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Solution

The fourth proportional to 157,330.80, 217,118.85 and 85,710.80 is: 118,282.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,330.80 : 217,118.85 = 85,710.80 : x
  2. Step 2: Convert to fraction form
    157,330.80/217,118.85 = 85,710.80/x
  3. Step 3: Cross multiply
    157,330.80x = 217,118.85 × 85,710.80
  4. Step 4: Simplify right side
    157,330.80x = 18,609,429,242.99
  5. Step 5: Solve for x
    x = 18,609,429,242.99/157,330.80
  6. Step 6: Final answer
    x = 118,282.18

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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.