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Finding the Fourth Proportional to 72,044.70, 99,421.80 and 40,213.59

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Solution

The fourth proportional to 72,044.70, 99,421.80 and 40,213.59 is: 55,494.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,044.70 : 99,421.80 = 40,213.59 : x
  2. Step 2: Convert to fraction form
    72,044.70/99,421.80 = 40,213.59/x
  3. Step 3: Cross multiply
    72,044.70x = 99,421.80 × 40,213.59
  4. Step 4: Simplify right side
    72,044.70x = 3,998,107,502.26
  5. Step 5: Solve for x
    x = 3,998,107,502.26/72,044.70
  6. Step 6: Final answer
    x = 55,494.82

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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.