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Finding the Fourth Proportional to 108,561.70, 162,601.95 and 83,416.66

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Solution

The fourth proportional to 108,561.70, 162,601.95 and 83,416.66 is: 124,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,561.70 : 162,601.95 = 83,416.66 : x
  2. Step 2: Convert to fraction form
    108,561.70/162,601.95 = 83,416.66/x
  3. Step 3: Cross multiply
    108,561.70x = 162,601.95 × 83,416.66
  4. Step 4: Simplify right side
    108,561.70x = 13,563,710,754.90
  5. Step 5: Solve for x
    x = 13,563,710,754.90/108,561.70
  6. Step 6: Final answer
    x = 124,940.11

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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.