Home / 128,018.72-176,586-92,151.92

Finding the Fourth Proportional to 128,018.72, 176,586 and 92,151.92

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Solution

The fourth proportional to 128,018.72, 176,586 and 92,151.92 is: 127,112.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,018.72 : 176,586 = 92,151.92 : x
  2. Step 2: Convert to fraction form
    128,018.72/176,586 = 92,151.92/x
  3. Step 3: Cross multiply
    128,018.72x = 176,586 × 92,151.92
  4. Step 4: Simplify right side
    128,018.72x = 16,272,738,945.12
  5. Step 5: Solve for x
    x = 16,272,738,945.12/128,018.72
  6. Step 6: Final answer
    x = 127,112.18

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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.