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Finding the Fourth Proportional to 90,851.80, 136,277.70 and 49,379.80

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Solution

The fourth proportional to 90,851.80, 136,277.70 and 49,379.80 is: 74,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,851.80 : 136,277.70 = 49,379.80 : x
  2. Step 2: Convert to fraction form
    90,851.80/136,277.70 = 49,379.80/x
  3. Step 3: Cross multiply
    90,851.80x = 136,277.70 × 49,379.80
  4. Step 4: Simplify right side
    90,851.80x = 6,729,365,570.46
  5. Step 5: Solve for x
    x = 6,729,365,570.46/90,851.80
  6. Step 6: Final answer
    x = 74,069.70

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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.