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Finding the Fourth Proportional to 86,879.20, 130,384.48 and 63,565.76

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Solution

The fourth proportional to 86,879.20, 130,384.48 and 63,565.76 is: 95,396.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,879.20 : 130,384.48 = 63,565.76 : x
  2. Step 2: Convert to fraction form
    86,879.20/130,384.48 = 63,565.76/x
  3. Step 3: Cross multiply
    86,879.20x = 130,384.48 × 63,565.76
  4. Step 4: Simplify right side
    86,879.20x = 8,287,988,563.40
  5. Step 5: Solve for x
    x = 8,287,988,563.40/86,879.20
  6. Step 6: Final answer
    x = 95,396.70

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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.