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Finding the Fourth Proportional to 117,140.38, 175,710.09 and 28,393.78

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Solution

The fourth proportional to 117,140.38, 175,710.09 and 28,393.78 is: 42,590.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,140.38 : 175,710.09 = 28,393.78 : x
  2. Step 2: Convert to fraction form
    117,140.38/175,710.09 = 28,393.78/x
  3. Step 3: Cross multiply
    117,140.38x = 175,710.09 × 28,393.78
  4. Step 4: Simplify right side
    117,140.38x = 4,989,073,639.24
  5. Step 5: Solve for x
    x = 4,989,073,639.24/117,140.38
  6. Step 6: Final answer
    x = 42,590.55

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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.