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Finding the Fourth Proportional to 61,260.80, 91,869.60 and 21,819.20

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Solution

The fourth proportional to 61,260.80, 91,869.60 and 21,819.20 is: 32,721.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,260.80 : 91,869.60 = 21,819.20 : x
  2. Step 2: Convert to fraction form
    61,260.80/91,869.60 = 21,819.20/x
  3. Step 3: Cross multiply
    61,260.80x = 91,869.60 × 21,819.20
  4. Step 4: Simplify right side
    61,260.80x = 2,004,521,176.32
  5. Step 5: Solve for x
    x = 2,004,521,176.32/61,260.80
  6. Step 6: Final answer
    x = 32,721.11

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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.