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Finding the Fourth Proportional to 86,695.76, 130,147.32 and 51,651.92

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Solution

The fourth proportional to 86,695.76, 130,147.32 and 51,651.92 is: 77,539.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,695.76 : 130,147.32 = 51,651.92 : x
  2. Step 2: Convert to fraction form
    86,695.76/130,147.32 = 51,651.92/x
  3. Step 3: Cross multiply
    86,695.76x = 130,147.32 × 51,651.92
  4. Step 4: Simplify right side
    86,695.76x = 6,722,358,960.85
  5. Step 5: Solve for x
    x = 6,722,358,960.85/86,695.76
  6. Step 6: Final answer
    x = 77,539.65

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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.