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Finding the Fourth Proportional to 124,516.70, 186,823.65 and 45,638.90

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Solution

The fourth proportional to 124,516.70, 186,823.65 and 45,638.90 is: 68,476.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,516.70 : 186,823.65 = 45,638.90 : x
  2. Step 2: Convert to fraction form
    124,516.70/186,823.65 = 45,638.90/x
  3. Step 3: Cross multiply
    124,516.70x = 186,823.65 × 45,638.90
  4. Step 4: Simplify right side
    124,516.70x = 8,526,425,879.99
  5. Step 5: Solve for x
    x = 8,526,425,879.99/124,516.70
  6. Step 6: Final answer
    x = 68,476.16

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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.