Home / 151,057.16-208,469.08-99,981.90

Finding the Fourth Proportional to 151,057.16, 208,469.08 and 99,981.90

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Solution

The fourth proportional to 151,057.16, 208,469.08 and 99,981.90 is: 137,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,057.16 : 208,469.08 = 99,981.90 : x
  2. Step 2: Convert to fraction form
    151,057.16/208,469.08 = 99,981.90/x
  3. Step 3: Cross multiply
    151,057.16x = 208,469.08 × 99,981.90
  4. Step 4: Simplify right side
    151,057.16x = 20,843,134,709.65
  5. Step 5: Solve for x
    x = 20,843,134,709.65/151,057.16
  6. Step 6: Final answer
    x = 137,981.77

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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.