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Finding the Fourth Proportional to 59,885.20, 89,900.70 and 30,287.80

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Solution

The fourth proportional to 59,885.20, 89,900.70 and 30,287.80 is: 45,468.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,885.20 : 89,900.70 = 30,287.80 : x
  2. Step 2: Convert to fraction form
    59,885.20/89,900.70 = 30,287.80/x
  3. Step 3: Cross multiply
    59,885.20x = 89,900.70 × 30,287.80
  4. Step 4: Simplify right side
    59,885.20x = 2,722,894,421.46
  5. Step 5: Solve for x
    x = 2,722,894,421.46/59,885.20
  6. Step 6: Final answer
    x = 45,468.57

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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.