Home / 129,015.06-178,040.76-72,426.38

Finding the Fourth Proportional to 129,015.06, 178,040.76 and 72,426.38

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Solution

The fourth proportional to 129,015.06, 178,040.76 and 72,426.38 is: 99,948.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,015.06 : 178,040.76 = 72,426.38 : x
  2. Step 2: Convert to fraction form
    129,015.06/178,040.76 = 72,426.38/x
  3. Step 3: Cross multiply
    129,015.06x = 178,040.76 × 72,426.38
  4. Step 4: Simplify right side
    129,015.06x = 12,894,847,739.25
  5. Step 5: Solve for x
    x = 12,894,847,739.25/129,015.06
  6. Step 6: Final answer
    x = 99,948.39

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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.