Home / 129,787.41-179,106.30-72,426.12

Finding the Fourth Proportional to 129,787.41, 179,106.30 and 72,426.12

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Solution

The fourth proportional to 129,787.41, 179,106.30 and 72,426.12 is: 99,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.41 : 179,106.30 = 72,426.12 : x
  2. Step 2: Convert to fraction form
    129,787.41/179,106.30 = 72,426.12/x
  3. Step 3: Cross multiply
    129,787.41x = 179,106.30 × 72,426.12
  4. Step 4: Simplify right side
    129,787.41x = 12,971,975,012.42
  5. Step 5: Solve for x
    x = 12,971,975,012.42/129,787.41
  6. Step 6: Final answer
    x = 99,947.87

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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.