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Finding the Fourth Proportional to 59,882.32, 89,842.92 and 28,720

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Solution

The fourth proportional to 59,882.32, 89,842.92 and 28,720 is: 43,089.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,882.32 : 89,842.92 = 28,720 : x
  2. Step 2: Convert to fraction form
    59,882.32/89,842.92 = 28,720/x
  3. Step 3: Cross multiply
    59,882.32x = 89,842.92 × 28,720
  4. Step 4: Simplify right side
    59,882.32x = 2,580,288,662.40
  5. Step 5: Solve for x
    x = 2,580,288,662.40/59,882.32
  6. Step 6: Final answer
    x = 43,089.32

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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.