Home / 90,812.72-125,320.92-49,979.32

Finding the Fourth Proportional to 90,812.72, 125,320.92 and 49,979.32

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Solution

The fourth proportional to 90,812.72, 125,320.92 and 49,979.32 is: 68,971.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,812.72 : 125,320.92 = 49,979.32 : x
  2. Step 2: Convert to fraction form
    90,812.72/125,320.92 = 49,979.32/x
  3. Step 3: Cross multiply
    90,812.72x = 125,320.92 × 49,979.32
  4. Step 4: Simplify right side
    90,812.72x = 6,263,454,363.37
  5. Step 5: Solve for x
    x = 6,263,454,363.37/90,812.72
  6. Step 6: Final answer
    x = 68,971.11

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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.