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Finding the Fourth Proportional to 72,044.16, 99,409.05 and 40,213.05

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Solution

The fourth proportional to 72,044.16, 99,409.05 and 40,213.05 is: 55,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,044.16 : 99,409.05 = 40,213.05 : x
  2. Step 2: Convert to fraction form
    72,044.16/99,409.05 = 40,213.05/x
  3. Step 3: Cross multiply
    72,044.16x = 99,409.05 × 40,213.05
  4. Step 4: Simplify right side
    72,044.16x = 3,997,541,098.10
  5. Step 5: Solve for x
    x = 3,997,541,098.10/72,044.16
  6. Step 6: Final answer
    x = 55,487.37

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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.