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Finding the Fourth Proportional to 85,045.76, 127,565.80 and 45,679.76

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Solution

The fourth proportional to 85,045.76, 127,565.80 and 45,679.76 is: 68,518.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,045.76 : 127,565.80 = 45,679.76 : x
  2. Step 2: Convert to fraction form
    85,045.76/127,565.80 = 45,679.76/x
  3. Step 3: Cross multiply
    85,045.76x = 127,565.80 × 45,679.76
  4. Step 4: Simplify right side
    85,045.76x = 5,827,175,128.21
  5. Step 5: Solve for x
    x = 5,827,175,128.21/85,045.76
  6. Step 6: Final answer
    x = 68,518.11

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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.