Home / 129,305.40-178,439.30-71,944.12

Finding the Fourth Proportional to 129,305.40, 178,439.30 and 71,944.12

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Solution

The fourth proportional to 129,305.40, 178,439.30 and 71,944.12 is: 99,281.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,305.40 : 178,439.30 = 71,944.12 : x
  2. Step 2: Convert to fraction form
    129,305.40/178,439.30 = 71,944.12/x
  3. Step 3: Cross multiply
    129,305.40x = 178,439.30 × 71,944.12
  4. Step 4: Simplify right side
    129,305.40x = 12,837,658,411.92
  5. Step 5: Solve for x
    x = 12,837,658,411.92/129,305.40
  6. Step 6: Final answer
    x = 99,281.69

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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.