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Finding the Fourth Proportional to 81,122.34, 121,510.98 and 38,940.24

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Solution

The fourth proportional to 81,122.34, 121,510.98 and 38,940.24 is: 58,327.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,122.34 : 121,510.98 = 38,940.24 : x
  2. Step 2: Convert to fraction form
    81,122.34/121,510.98 = 38,940.24/x
  3. Step 3: Cross multiply
    81,122.34x = 121,510.98 × 38,940.24
  4. Step 4: Simplify right side
    81,122.34x = 4,731,666,723.84
  5. Step 5: Solve for x
    x = 4,731,666,723.84/81,122.34
  6. Step 6: Final answer
    x = 58,327.54

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1.5x scale

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.