Home / 128,115.16-176,782.44-71,528.92

Finding the Fourth Proportional to 128,115.16, 176,782.44 and 71,528.92

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Solution

The fourth proportional to 128,115.16, 176,782.44 and 71,528.92 is: 98,700.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,115.16 : 176,782.44 = 71,528.92 : x
  2. Step 2: Convert to fraction form
    128,115.16/176,782.44 = 71,528.92/x
  3. Step 3: Cross multiply
    128,115.16x = 176,782.44 × 71,528.92
  4. Step 4: Simplify right side
    128,115.16x = 12,645,057,008.16
  5. Step 5: Solve for x
    x = 12,645,057,008.16/128,115.16
  6. Step 6: Final answer
    x = 98,700.71

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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.