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Finding the Fourth Proportional to 86,674.80, 129,979.80 and 60,301.20

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Solution

The fourth proportional to 86,674.80, 129,979.80 and 60,301.20 is: 90,429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,674.80 : 129,979.80 = 60,301.20 : x
  2. Step 2: Convert to fraction form
    86,674.80/129,979.80 = 60,301.20/x
  3. Step 3: Cross multiply
    86,674.80x = 129,979.80 × 60,301.20
  4. Step 4: Simplify right side
    86,674.80x = 7,837,937,915.76
  5. Step 5: Solve for x
    x = 7,837,937,915.76/86,674.80
  6. Step 6: Final answer
    x = 90,429.26

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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.