Home / 129,316.34-178,435.68-72,724.34

Finding the Fourth Proportional to 129,316.34, 178,435.68 and 72,724.34

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Solution

The fourth proportional to 129,316.34, 178,435.68 and 72,724.34 is: 100,347.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,316.34 : 178,435.68 = 72,724.34 : x
  2. Step 2: Convert to fraction form
    129,316.34/178,435.68 = 72,724.34/x
  3. Step 3: Cross multiply
    129,316.34x = 178,435.68 × 72,724.34
  4. Step 4: Simplify right side
    129,316.34x = 12,976,617,060.45
  5. Step 5: Solve for x
    x = 12,976,617,060.45/129,316.34
  6. Step 6: Final answer
    x = 100,347.85

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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.