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Finding the Fourth Proportional to 86,911.68, 130,130.44 and 65,787.69

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Solution

The fourth proportional to 86,911.68, 130,130.44 and 65,787.69 is: 98,502.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,911.68 : 130,130.44 = 65,787.69 : x
  2. Step 2: Convert to fraction form
    86,911.68/130,130.44 = 65,787.69/x
  3. Step 3: Cross multiply
    86,911.68x = 130,130.44 × 65,787.69
  4. Step 4: Simplify right side
    86,911.68x = 8,560,981,046.28
  5. Step 5: Solve for x
    x = 8,560,981,046.28/86,911.68
  6. Step 6: Final answer
    x = 98,502.08

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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.