Home / 129,443.28-178,631.35-72,854.65

Finding the Fourth Proportional to 129,443.28, 178,631.35 and 72,854.65

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Solution

The fourth proportional to 129,443.28, 178,631.35 and 72,854.65 is: 100,539.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,443.28 : 178,631.35 = 72,854.65 : x
  2. Step 2: Convert to fraction form
    129,443.28/178,631.35 = 72,854.65/x
  3. Step 3: Cross multiply
    129,443.28x = 178,631.35 × 72,854.65
  4. Step 4: Simplify right side
    129,443.28x = 13,014,124,483.28
  5. Step 5: Solve for x
    x = 13,014,124,483.28/129,443.28
  6. Step 6: Final answer
    x = 100,539.21

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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.