Home / 129,700.44-178,986.24-72,339.84

Finding the Fourth Proportional to 129,700.44, 178,986.24 and 72,339.84

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Solution

The fourth proportional to 129,700.44, 178,986.24 and 72,339.84 is: 99,828.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,700.44 : 178,986.24 = 72,339.84 : x
  2. Step 2: Convert to fraction form
    129,700.44/178,986.24 = 72,339.84/x
  3. Step 3: Cross multiply
    129,700.44x = 178,986.24 × 72,339.84
  4. Step 4: Simplify right side
    129,700.44x = 12,947,835,963.80
  5. Step 5: Solve for x
    x = 12,947,835,963.80/129,700.44
  6. Step 6: Final answer
    x = 99,828.77

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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.