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Finding the Fourth Proportional to 85,821.80, 128,819.10 and 41,484.20

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Solution

The fourth proportional to 85,821.80, 128,819.10 and 41,484.20 is: 62,268.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,821.80 : 128,819.10 = 41,484.20 : x
  2. Step 2: Convert to fraction form
    85,821.80/128,819.10 = 41,484.20/x
  3. Step 3: Cross multiply
    85,821.80x = 128,819.10 × 41,484.20
  4. Step 4: Simplify right side
    85,821.80x = 5,343,957,308.22
  5. Step 5: Solve for x
    x = 5,343,957,308.22/85,821.80
  6. Step 6: Final answer
    x = 62,268.06

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1.5x scale

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.