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Finding the Fourth Proportional to 72,428.50, 108,660.50 and 58,514.59

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Solution

The fourth proportional to 72,428.50, 108,660.50 and 58,514.59 is: 87,786.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,428.50 : 108,660.50 = 58,514.59 : x
  2. Step 2: Convert to fraction form
    72,428.50/108,660.50 = 58,514.59/x
  3. Step 3: Cross multiply
    72,428.50x = 108,660.50 × 58,514.59
  4. Step 4: Simplify right side
    72,428.50x = 6,358,224,606.70
  5. Step 5: Solve for x
    x = 6,358,224,606.70/72,428.50
  6. Step 6: Final answer
    x = 87,786.23

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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.