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Finding the Fourth Proportional to 118,586.25, 163,687.91 and 85,149.45

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Solution

The fourth proportional to 118,586.25, 163,687.91 and 85,149.45 is: 117,534.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,586.25 : 163,687.91 = 85,149.45 : x
  2. Step 2: Convert to fraction form
    118,586.25/163,687.91 = 85,149.45/x
  3. Step 3: Cross multiply
    118,586.25x = 163,687.91 × 85,149.45
  4. Step 4: Simplify right side
    118,586.25x = 13,937,935,082.40
  5. Step 5: Solve for x
    x = 13,937,935,082.40/118,586.25
  6. Step 6: Final answer
    x = 117,534.16

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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.