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Finding the Fourth Proportional to 98,340.72, 135,689.85 and 57,496.98

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Solution

The fourth proportional to 98,340.72, 135,689.85 and 57,496.98 is: 79,333.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,340.72 : 135,689.85 = 57,496.98 : x
  2. Step 2: Convert to fraction form
    98,340.72/135,689.85 = 57,496.98/x
  3. Step 3: Cross multiply
    98,340.72x = 135,689.85 × 57,496.98
  4. Step 4: Simplify right side
    98,340.72x = 7,801,756,591.65
  5. Step 5: Solve for x
    x = 7,801,756,591.65/98,340.72
  6. Step 6: Final answer
    x = 79,333.94

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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.