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Finding the Fourth Proportional to 99,679.76, 137,561.37 and 54,360.21

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Solution

The fourth proportional to 99,679.76, 137,561.37 and 54,360.21 is: 75,018.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,679.76 : 137,561.37 = 54,360.21 : x
  2. Step 2: Convert to fraction form
    99,679.76/137,561.37 = 54,360.21/x
  3. Step 3: Cross multiply
    99,679.76x = 137,561.37 × 54,360.21
  4. Step 4: Simplify right side
    99,679.76x = 7,477,864,961.09
  5. Step 5: Solve for x
    x = 7,477,864,961.09/99,679.76
  6. Step 6: Final answer
    x = 75,018.89

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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.