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Finding the Fourth Proportional to 86,343.93, 129,315.15 and 83,350.71

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Solution

The fourth proportional to 86,343.93, 129,315.15 and 83,350.71 is: 124,832.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,343.93 : 129,315.15 = 83,350.71 : x
  2. Step 2: Convert to fraction form
    86,343.93/129,315.15 = 83,350.71/x
  3. Step 3: Cross multiply
    86,343.93x = 129,315.15 × 83,350.71
  4. Step 4: Simplify right side
    86,343.93x = 10,778,509,566.26
  5. Step 5: Solve for x
    x = 10,778,509,566.26/86,343.93
  6. Step 6: Final answer
    x = 124,832.28

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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.