Home / 121,629.18-182,432.64-86,242.32

Finding the Fourth Proportional to 121,629.18, 182,432.64 and 86,242.32

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Solution

The fourth proportional to 121,629.18, 182,432.64 and 86,242.32 is: 129,355.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,629.18 : 182,432.64 = 86,242.32 : x
  2. Step 2: Convert to fraction form
    121,629.18/182,432.64 = 86,242.32/x
  3. Step 3: Cross multiply
    121,629.18x = 182,432.64 × 86,242.32
  4. Step 4: Simplify right side
    121,629.18x = 15,733,414,117.32
  5. Step 5: Solve for x
    x = 15,733,414,117.32/121,629.18
  6. Step 6: Final answer
    x = 129,355.59

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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.