Home / 129,787.49-179,106.41-72,426.22

Finding the Fourth Proportional to 129,787.49, 179,106.41 and 72,426.22

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Solution

The fourth proportional to 129,787.49, 179,106.41 and 72,426.22 is: 99,947.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.49 : 179,106.41 = 72,426.22 : x
  2. Step 2: Convert to fraction form
    129,787.49/179,106.41 = 72,426.22/x
  3. Step 3: Cross multiply
    129,787.49x = 179,106.41 × 72,426.22
  4. Step 4: Simplify right side
    129,787.49x = 12,971,999,444.17
  5. Step 5: Solve for x
    x = 12,971,999,444.17/129,787.49
  6. Step 6: Final answer
    x = 99,947.99

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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.