Home / 85,176.80-128,403.02-79,467.92

Finding the Fourth Proportional to 85,176.80, 128,403.02 and 79,467.92

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Solution

The fourth proportional to 85,176.80, 128,403.02 and 79,467.92 is: 119,796.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,176.80 : 128,403.02 = 79,467.92 : x
  2. Step 2: Convert to fraction form
    85,176.80/128,403.02 = 79,467.92/x
  3. Step 3: Cross multiply
    85,176.80x = 128,403.02 × 79,467.92
  4. Step 4: Simplify right side
    85,176.80x = 10,203,920,921.12
  5. Step 5: Solve for x
    x = 10,203,920,921.12/85,176.80
  6. Step 6: Final answer
    x = 119,796.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.