Home / 129,403.55-178,575.63-75,678.41

Finding the Fourth Proportional to 129,403.55, 178,575.63 and 75,678.41

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Solution

The fourth proportional to 129,403.55, 178,575.63 and 75,678.41 is: 104,435.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,403.55 : 178,575.63 = 75,678.41 : x
  2. Step 2: Convert to fraction form
    129,403.55/178,575.63 = 75,678.41/x
  3. Step 3: Cross multiply
    129,403.55x = 178,575.63 × 75,678.41
  4. Step 4: Simplify right side
    129,403.55x = 13,514,319,743.15
  5. Step 5: Solve for x
    x = 13,514,319,743.15/129,403.55
  6. Step 6: Final answer
    x = 104,435.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.