Home / 142,120.23-196,124.71-78,456.66

Finding the Fourth Proportional to 142,120.23, 196,124.71 and 78,456.66

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Solution

The fourth proportional to 142,120.23, 196,124.71 and 78,456.66 is: 108,269.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,120.23 : 196,124.71 = 78,456.66 : x
  2. Step 2: Convert to fraction form
    142,120.23/196,124.71 = 78,456.66/x
  3. Step 3: Cross multiply
    142,120.23x = 196,124.71 × 78,456.66
  4. Step 4: Simplify right side
    142,120.23x = 15,387,289,690.07
  5. Step 5: Solve for x
    x = 15,387,289,690.07/142,120.23
  6. Step 6: Final answer
    x = 108,269.52

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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.