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Finding the Fourth Proportional to 55,111.87, 82,641.88 and 38,490.67

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Solution

The fourth proportional to 55,111.87, 82,641.88 and 38,490.67 is: 57,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,111.87 : 82,641.88 = 38,490.67 : x
  2. Step 2: Convert to fraction form
    55,111.87/82,641.88 = 38,490.67/x
  3. Step 3: Cross multiply
    55,111.87x = 82,641.88 × 38,490.67
  4. Step 4: Simplify right side
    55,111.87x = 3,180,941,331.26
  5. Step 5: Solve for x
    x = 3,180,941,331.26/55,111.87
  6. Step 6: Final answer
    x = 57,717.90

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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.