Home / 142,820.28-197,094.42-78,285.20

Finding the Fourth Proportional to 142,820.28, 197,094.42 and 78,285.20

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Solution

The fourth proportional to 142,820.28, 197,094.42 and 78,285.20 is: 108,034.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,820.28 : 197,094.42 = 78,285.20 : x
  2. Step 2: Convert to fraction form
    142,820.28/197,094.42 = 78,285.20/x
  3. Step 3: Cross multiply
    142,820.28x = 197,094.42 × 78,285.20
  4. Step 4: Simplify right side
    142,820.28x = 15,429,575,103.11
  5. Step 5: Solve for x
    x = 15,429,575,103.11/142,820.28
  6. Step 6: Final answer
    x = 108,034.90

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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.