Home / 86,643.24-129,669.15-72,619.11

Finding the Fourth Proportional to 86,643.24, 129,669.15 and 72,619.11

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Solution

The fourth proportional to 86,643.24, 129,669.15 and 72,619.11 is: 108,680.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,643.24 : 129,669.15 = 72,619.11 : x
  2. Step 2: Convert to fraction form
    86,643.24/129,669.15 = 72,619.11/x
  3. Step 3: Cross multiply
    86,643.24x = 129,669.15 × 72,619.11
  4. Step 4: Simplify right side
    86,643.24x = 9,416,458,267.46
  5. Step 5: Solve for x
    x = 9,416,458,267.46/86,643.24
  6. Step 6: Final answer
    x = 108,680.82

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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.