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Finding the Fourth Proportional to 86,576.30, 129,864.45 and 81,392.30

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Solution

The fourth proportional to 86,576.30, 129,864.45 and 81,392.30 is: 122,088.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.30 : 129,864.45 = 81,392.30 : x
  2. Step 2: Convert to fraction form
    86,576.30/129,864.45 = 81,392.30/x
  3. Step 3: Cross multiply
    86,576.30x = 129,864.45 × 81,392.30
  4. Step 4: Simplify right side
    86,576.30x = 10,569,966,273.74
  5. Step 5: Solve for x
    x = 10,569,966,273.74/86,576.30
  6. Step 6: Final answer
    x = 122,088.45

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1.5x scale

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.