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Finding the Fourth Proportional to 59,990.50, 89,986.20 and 20,548

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Solution

The fourth proportional to 59,990.50, 89,986.20 and 20,548 is: 30,822.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,990.50 : 89,986.20 = 20,548 : x
  2. Step 2: Convert to fraction form
    59,990.50/89,986.20 = 20,548/x
  3. Step 3: Cross multiply
    59,990.50x = 89,986.20 × 20,548
  4. Step 4: Simplify right side
    59,990.50x = 1,849,036,437.60
  5. Step 5: Solve for x
    x = 1,849,036,437.60/59,990.50
  6. Step 6: Final answer
    x = 30,822.15

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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.