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Finding the Fourth Proportional to 77,005.01, 115,498.64 and 20,841.80

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Solution

The fourth proportional to 77,005.01, 115,498.64 and 20,841.80 is: 31,260.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,005.01 : 115,498.64 = 20,841.80 : x
  2. Step 2: Convert to fraction form
    77,005.01/115,498.64 = 20,841.80/x
  3. Step 3: Cross multiply
    77,005.01x = 115,498.64 × 20,841.80
  4. Step 4: Simplify right side
    77,005.01x = 2,407,198,873.45
  5. Step 5: Solve for x
    x = 2,407,198,873.45/77,005.01
  6. Step 6: Final answer
    x = 31,260.29

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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.