Home / 128,001.24-176,642.22-71,415

Finding the Fourth Proportional to 128,001.24, 176,642.22 and 71,415

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Solution

The fourth proportional to 128,001.24, 176,642.22 and 71,415 is: 98,552.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.24 : 176,642.22 = 71,415 : x
  2. Step 2: Convert to fraction form
    128,001.24/176,642.22 = 71,415/x
  3. Step 3: Cross multiply
    128,001.24x = 176,642.22 × 71,415
  4. Step 4: Simplify right side
    128,001.24x = 12,614,904,141.30
  5. Step 5: Solve for x
    x = 12,614,904,141.30/128,001.24
  6. Step 6: Final answer
    x = 98,552.98

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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.