Home / 86,343.36-129,515.04-81,470.40

Finding the Fourth Proportional to 86,343.36, 129,515.04 and 81,470.40

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Solution

The fourth proportional to 86,343.36, 129,515.04 and 81,470.40 is: 122,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,343.36 : 129,515.04 = 81,470.40 : x
  2. Step 2: Convert to fraction form
    86,343.36/129,515.04 = 81,470.40/x
  3. Step 3: Cross multiply
    86,343.36x = 129,515.04 × 81,470.40
  4. Step 4: Simplify right side
    86,343.36x = 10,551,642,114.82
  5. Step 5: Solve for x
    x = 10,551,642,114.82/86,343.36
  6. Step 6: Final answer
    x = 122,205.60

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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.