Home / 142,478.92-196,621.05-78,821.02

Finding the Fourth Proportional to 142,478.92, 196,621.05 and 78,821.02

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Solution

The fourth proportional to 142,478.92, 196,621.05 and 78,821.02 is: 108,773.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,478.92 : 196,621.05 = 78,821.02 : x
  2. Step 2: Convert to fraction form
    142,478.92/196,621.05 = 78,821.02/x
  3. Step 3: Cross multiply
    142,478.92x = 196,621.05 × 78,821.02
  4. Step 4: Simplify right side
    142,478.92x = 15,497,871,714.47
  5. Step 5: Solve for x
    x = 15,497,871,714.47/142,478.92
  6. Step 6: Final answer
    x = 108,773.09

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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.