Home / 129,548.42-178,789.57-75,830.18

Finding the Fourth Proportional to 129,548.42, 178,789.57 and 75,830.18

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Solution

The fourth proportional to 129,548.42, 178,789.57 and 75,830.18 is: 104,653.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,548.42 : 178,789.57 = 75,830.18 : x
  2. Step 2: Convert to fraction form
    129,548.42/178,789.57 = 75,830.18/x
  3. Step 3: Cross multiply
    129,548.42x = 178,789.57 × 75,830.18
  4. Step 4: Simplify right side
    129,548.42x = 13,557,645,275.22
  5. Step 5: Solve for x
    x = 13,557,645,275.22/129,548.42
  6. Step 6: Final answer
    x = 104,653.11

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1.5x scale

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.