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Finding the Fourth Proportional to 103,809.52, 155,718.16 and 36,328.40

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Solution

The fourth proportional to 103,809.52, 155,718.16 and 36,328.40 is: 54,493.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,809.52 : 155,718.16 = 36,328.40 : x
  2. Step 2: Convert to fraction form
    103,809.52/155,718.16 = 36,328.40/x
  3. Step 3: Cross multiply
    103,809.52x = 155,718.16 × 36,328.40
  4. Step 4: Simplify right side
    103,809.52x = 5,656,991,603.74
  5. Step 5: Solve for x
    x = 5,656,991,603.74/103,809.52
  6. Step 6: Final answer
    x = 54,493.96

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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.