Home / 129,184.09-178,290.44-72,595.42

Finding the Fourth Proportional to 129,184.09, 178,290.44 and 72,595.42

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Solution

The fourth proportional to 129,184.09, 178,290.44 and 72,595.42 is: 100,190.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,184.09 : 178,290.44 = 72,595.42 : x
  2. Step 2: Convert to fraction form
    129,184.09/178,290.44 = 72,595.42/x
  3. Step 3: Cross multiply
    129,184.09x = 178,290.44 × 72,595.42
  4. Step 4: Simplify right side
    129,184.09x = 12,943,069,373.78
  5. Step 5: Solve for x
    x = 12,943,069,373.78/129,184.09
  6. Step 6: Final answer
    x = 100,190.89

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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.