Home / 129,776.04-179,078.49-78,816.66

Finding the Fourth Proportional to 129,776.04, 179,078.49 and 78,816.66

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Solution

The fourth proportional to 129,776.04, 179,078.49 and 78,816.66 is: 108,759.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,776.04 : 179,078.49 = 78,816.66 : x
  2. Step 2: Convert to fraction form
    129,776.04/179,078.49 = 78,816.66/x
  3. Step 3: Cross multiply
    129,776.04x = 179,078.49 × 78,816.66
  4. Step 4: Simplify right side
    129,776.04x = 14,114,368,459.64
  5. Step 5: Solve for x
    x = 14,114,368,459.64/129,776.04
  6. Step 6: Final answer
    x = 108,759.43

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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.