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Finding the Fourth Proportional to 115,752.80, 173,629.20 and 71,429.60

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Solution

The fourth proportional to 115,752.80, 173,629.20 and 71,429.60 is: 107,144.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,752.80 : 173,629.20 = 71,429.60 : x
  2. Step 2: Convert to fraction form
    115,752.80/173,629.20 = 71,429.60/x
  3. Step 3: Cross multiply
    115,752.80x = 173,629.20 × 71,429.60
  4. Step 4: Simplify right side
    115,752.80x = 12,402,264,304.32
  5. Step 5: Solve for x
    x = 12,402,264,304.32/115,752.80
  6. Step 6: Final answer
    x = 107,144.40

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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.