Home / 104,821.20-156,886.20-81,320.40

Finding the Fourth Proportional to 104,821.20, 156,886.20 and 81,320.40

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Solution

The fourth proportional to 104,821.20, 156,886.20 and 81,320.40 is: 121,712.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,821.20 : 156,886.20 = 81,320.40 : x
  2. Step 2: Convert to fraction form
    104,821.20/156,886.20 = 81,320.40/x
  3. Step 3: Cross multiply
    104,821.20x = 156,886.20 × 81,320.40
  4. Step 4: Simplify right side
    104,821.20x = 12,758,048,538.48
  5. Step 5: Solve for x
    x = 12,758,048,538.48/104,821.20
  6. Step 6: Final answer
    x = 121,712.48

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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.