Home / 129,014.06-178,039.38-72,425.38

Finding the Fourth Proportional to 129,014.06, 178,039.38 and 72,425.38

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Solution

The fourth proportional to 129,014.06, 178,039.38 and 72,425.38 is: 99,947.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,014.06 : 178,039.38 = 72,425.38 : x
  2. Step 2: Convert to fraction form
    129,014.06/178,039.38 = 72,425.38/x
  3. Step 3: Cross multiply
    129,014.06x = 178,039.38 × 72,425.38
  4. Step 4: Simplify right side
    129,014.06x = 12,894,569,751.46
  5. Step 5: Solve for x
    x = 12,894,569,751.46/129,014.06
  6. Step 6: Final answer
    x = 99,947.01

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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.