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Finding the Fourth Proportional to 86,108.68, 129,162.84 and 23,779

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Solution

The fourth proportional to 86,108.68, 129,162.84 and 23,779 is: 35,668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,108.68 : 129,162.84 = 23,779 : x
  2. Step 2: Convert to fraction form
    86,108.68/129,162.84 = 23,779/x
  3. Step 3: Cross multiply
    86,108.68x = 129,162.84 × 23,779
  4. Step 4: Simplify right side
    86,108.68x = 3,071,363,172.36
  5. Step 5: Solve for x
    x = 3,071,363,172.36/86,108.68
  6. Step 6: Final answer
    x = 35,668.45

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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.