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Finding the Fourth Proportional to 84,347.70, 126,521.55 and 34,411.20

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Solution

The fourth proportional to 84,347.70, 126,521.55 and 34,411.20 is: 51,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,347.70 : 126,521.55 = 34,411.20 : x
  2. Step 2: Convert to fraction form
    84,347.70/126,521.55 = 34,411.20/x
  3. Step 3: Cross multiply
    84,347.70x = 126,521.55 × 34,411.20
  4. Step 4: Simplify right side
    84,347.70x = 4,353,758,361.36
  5. Step 5: Solve for x
    x = 4,353,758,361.36/84,347.70
  6. Step 6: Final answer
    x = 51,616.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.