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Finding the Fourth Proportional to 73,440, 101,347.20 and 39,906

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Solution

The fourth proportional to 73,440, 101,347.20 and 39,906 is: 55,070.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,440 : 101,347.20 = 39,906 : x
  2. Step 2: Convert to fraction form
    73,440/101,347.20 = 39,906/x
  3. Step 3: Cross multiply
    73,440x = 101,347.20 × 39,906
  4. Step 4: Simplify right side
    73,440x = 4,044,361,363.20
  5. Step 5: Solve for x
    x = 4,044,361,363.20/73,440
  6. Step 6: Final answer
    x = 55,070.28

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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.