Home / 129,340.50-178,500.15-72,756.06

Finding the Fourth Proportional to 129,340.50, 178,500.15 and 72,756.06

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Solution

The fourth proportional to 129,340.50, 178,500.15 and 72,756.06 is: 100,409.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,340.50 : 178,500.15 = 72,756.06 : x
  2. Step 2: Convert to fraction form
    129,340.50/178,500.15 = 72,756.06/x
  3. Step 3: Cross multiply
    129,340.50x = 178,500.15 × 72,756.06
  4. Step 4: Simplify right side
    129,340.50x = 12,986,967,623.41
  5. Step 5: Solve for x
    x = 12,986,967,623.41/129,340.50
  6. Step 6: Final answer
    x = 100,409.13

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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.