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Finding the Fourth Proportional to 58,320.80, 87,502.80 and 18,879.20

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Solution

The fourth proportional to 58,320.80, 87,502.80 and 18,879.20 is: 28,325.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,320.80 : 87,502.80 = 18,879.20 : x
  2. Step 2: Convert to fraction form
    58,320.80/87,502.80 = 18,879.20/x
  3. Step 3: Cross multiply
    58,320.80x = 87,502.80 × 18,879.20
  4. Step 4: Simplify right side
    58,320.80x = 1,651,982,861.76
  5. Step 5: Solve for x
    x = 1,651,982,861.76/58,320.80
  6. Step 6: Final answer
    x = 28,325.79

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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.