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Finding the Fourth Proportional to 85,038.90, 127,687.95 and 50,046.90

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Solution

The fourth proportional to 85,038.90, 127,687.95 and 50,046.90 is: 75,146.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,038.90 : 127,687.95 = 50,046.90 : x
  2. Step 2: Convert to fraction form
    85,038.90/127,687.95 = 50,046.90/x
  3. Step 3: Cross multiply
    85,038.90x = 127,687.95 × 50,046.90
  4. Step 4: Simplify right side
    85,038.90x = 6,390,386,064.86
  5. Step 5: Solve for x
    x = 6,390,386,064.86/85,038.90
  6. Step 6: Final answer
    x = 75,146.62

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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.