Home / 129,570.30-178,803.72-72,209.88

Finding the Fourth Proportional to 129,570.30, 178,803.72 and 72,209.88

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Solution

The fourth proportional to 129,570.30, 178,803.72 and 72,209.88 is: 99,647.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,570.30 : 178,803.72 = 72,209.88 : x
  2. Step 2: Convert to fraction form
    129,570.30/178,803.72 = 72,209.88/x
  3. Step 3: Cross multiply
    129,570.30x = 178,803.72 × 72,209.88
  4. Step 4: Simplify right side
    129,570.30x = 12,911,395,164.75
  5. Step 5: Solve for x
    x = 12,911,395,164.75/129,570.30
  6. Step 6: Final answer
    x = 99,647.80

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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.