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Finding the Fourth Proportional to 72,229.86, 99,681.12 and 43,558.74

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Solution

The fourth proportional to 72,229.86, 99,681.12 and 43,558.74 is: 60,113.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,229.86 : 99,681.12 = 43,558.74 : x
  2. Step 2: Convert to fraction form
    72,229.86/99,681.12 = 43,558.74/x
  3. Step 3: Cross multiply
    72,229.86x = 99,681.12 × 43,558.74
  4. Step 4: Simplify right side
    72,229.86x = 4,341,983,988.99
  5. Step 5: Solve for x
    x = 4,341,983,988.99/72,229.86
  6. Step 6: Final answer
    x = 60,113.42

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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.