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Finding the Fourth Proportional to 59,855.52, 89,771.76 and 20,407.20

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Solution

The fourth proportional to 59,855.52, 89,771.76 and 20,407.20 is: 30,606.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,855.52 : 89,771.76 = 20,407.20 : x
  2. Step 2: Convert to fraction form
    59,855.52/89,771.76 = 20,407.20/x
  3. Step 3: Cross multiply
    59,855.52x = 89,771.76 × 20,407.20
  4. Step 4: Simplify right side
    59,855.52x = 1,831,990,260.67
  5. Step 5: Solve for x
    x = 1,831,990,260.67/59,855.52
  6. Step 6: Final answer
    x = 30,606.87

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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.