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Finding the Fourth Proportional to 99,798.24, 137,721.60 and 55,086.24

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Solution

The fourth proportional to 99,798.24, 137,721.60 and 55,086.24 is: 76,019.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,798.24 : 137,721.60 = 55,086.24 : x
  2. Step 2: Convert to fraction form
    99,798.24/137,721.60 = 55,086.24/x
  3. Step 3: Cross multiply
    99,798.24x = 137,721.60 × 55,086.24
  4. Step 4: Simplify right side
    99,798.24x = 7,586,565,110.78
  5. Step 5: Solve for x
    x = 7,586,565,110.78/99,798.24
  6. Step 6: Final answer
    x = 76,019.03

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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.