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Finding the Fourth Proportional to 169,586.65, 254,385.39 and 85,300.78

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Solution

The fourth proportional to 169,586.65, 254,385.39 and 85,300.78 is: 127,953.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,586.65 : 254,385.39 = 85,300.78 : x
  2. Step 2: Convert to fraction form
    169,586.65/254,385.39 = 85,300.78/x
  3. Step 3: Cross multiply
    169,586.65x = 254,385.39 × 85,300.78
  4. Step 4: Simplify right side
    169,586.65x = 21,699,272,187.60
  5. Step 5: Solve for x
    x = 21,699,272,187.60/169,586.65
  6. Step 6: Final answer
    x = 127,953.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.