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Finding the Fourth Proportional to 72,648.65, 100,255.23 and 40,817.53

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Solution

The fourth proportional to 72,648.65, 100,255.23 and 40,817.53 is: 56,328.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,648.65 : 100,255.23 = 40,817.53 : x
  2. Step 2: Convert to fraction form
    72,648.65/100,255.23 = 40,817.53/x
  3. Step 3: Cross multiply
    72,648.65x = 100,255.23 × 40,817.53
  4. Step 4: Simplify right side
    72,648.65x = 4,092,170,654.09
  5. Step 5: Solve for x
    x = 4,092,170,654.09/72,648.65
  6. Step 6: Final answer
    x = 56,328.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.