Home / 142,535.08-196,700.16-78,878.80

Finding the Fourth Proportional to 142,535.08, 196,700.16 and 78,878.80

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Solution

The fourth proportional to 142,535.08, 196,700.16 and 78,878.80 is: 108,853.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,535.08 : 196,700.16 = 78,878.80 : x
  2. Step 2: Convert to fraction form
    142,535.08/196,700.16 = 78,878.80/x
  3. Step 3: Cross multiply
    142,535.08x = 196,700.16 × 78,878.80
  4. Step 4: Simplify right side
    142,535.08x = 15,515,472,580.61
  5. Step 5: Solve for x
    x = 15,515,472,580.61/142,535.08
  6. Step 6: Final answer
    x = 108,853.71

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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.