Home / 129,780.04-179,096.16-72,415.84

Finding the Fourth Proportional to 129,780.04, 179,096.16 and 72,415.84

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Solution

The fourth proportional to 129,780.04, 179,096.16 and 72,415.84 is: 99,933.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.04 : 179,096.16 = 72,415.84 : x
  2. Step 2: Convert to fraction form
    129,780.04/179,096.16 = 72,415.84/x
  3. Step 3: Cross multiply
    129,780.04x = 179,096.16 × 72,415.84
  4. Step 4: Simplify right side
    129,780.04x = 12,969,398,867.17
  5. Step 5: Solve for x
    x = 12,969,398,867.17/129,780.04
  6. Step 6: Final answer
    x = 99,933.69

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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.