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Finding the Fourth Proportional to 142,746, 196,986.60 and 82,319.28

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Solution

The fourth proportional to 142,746, 196,986.60 and 82,319.28 is: 113,598.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,746 : 196,986.60 = 82,319.28 : x
  2. Step 2: Convert to fraction form
    142,746/196,986.60 = 82,319.28/x
  3. Step 3: Cross multiply
    142,746x = 196,986.60 × 82,319.28
  4. Step 4: Simplify right side
    142,746x = 16,215,795,081.65
  5. Step 5: Solve for x
    x = 16,215,795,081.65/142,746
  6. Step 6: Final answer
    x = 113,598.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.