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Finding the Fourth Proportional to 91,990.80, 138,010.48 and 49,852.16

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Solution

The fourth proportional to 91,990.80, 138,010.48 and 49,852.16 is: 74,791.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,990.80 : 138,010.48 = 49,852.16 : x
  2. Step 2: Convert to fraction form
    91,990.80/138,010.48 = 49,852.16/x
  3. Step 3: Cross multiply
    91,990.80x = 138,010.48 × 49,852.16
  4. Step 4: Simplify right side
    91,990.80x = 6,880,120,530.64
  5. Step 5: Solve for x
    x = 6,880,120,530.64/91,990.80
  6. Step 6: Final answer
    x = 74,791.40

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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.