Home / 128,178.92-176,889.66-71,590.40

Finding the Fourth Proportional to 128,178.92, 176,889.66 and 71,590.40

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Solution

The fourth proportional to 128,178.92, 176,889.66 and 71,590.40 is: 98,796.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,178.92 : 176,889.66 = 71,590.40 : x
  2. Step 2: Convert to fraction form
    128,178.92/176,889.66 = 71,590.40/x
  3. Step 3: Cross multiply
    128,178.92x = 176,889.66 × 71,590.40
  4. Step 4: Simplify right side
    128,178.92x = 12,663,601,515.26
  5. Step 5: Solve for x
    x = 12,663,601,515.26/128,178.92
  6. Step 6: Final answer
    x = 98,796.29

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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.