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Finding the Fourth Proportional to 85,373.19, 128,019.89 and 49,844.77

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Solution

The fourth proportional to 85,373.19, 128,019.89 and 49,844.77 is: 74,743.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,373.19 : 128,019.89 = 49,844.77 : x
  2. Step 2: Convert to fraction form
    85,373.19/128,019.89 = 49,844.77/x
  3. Step 3: Cross multiply
    85,373.19x = 128,019.89 × 49,844.77
  4. Step 4: Simplify right side
    85,373.19x = 6,381,121,777.04
  5. Step 5: Solve for x
    x = 6,381,121,777.04/85,373.19
  6. Step 6: Final answer
    x = 74,743.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.