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Finding the Fourth Proportional to 78,159.80, 117,143.45 and 44,454.08

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Solution

The fourth proportional to 78,159.80, 117,143.45 and 44,454.08 is: 66,626.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,159.80 : 117,143.45 = 44,454.08 : x
  2. Step 2: Convert to fraction form
    78,159.80/117,143.45 = 44,454.08/x
  3. Step 3: Cross multiply
    78,159.80x = 117,143.45 × 44,454.08
  4. Step 4: Simplify right side
    78,159.80x = 5,207,504,535.07
  5. Step 5: Solve for x
    x = 5,207,504,535.07/78,159.80
  6. Step 6: Final answer
    x = 66,626.38

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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.