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Finding the Fourth Proportional to 103,840.80, 155,530.80 and 41,479.20

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Solution

The fourth proportional to 103,840.80, 155,530.80 and 41,479.20 is: 62,126.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,840.80 : 155,530.80 = 41,479.20 : x
  2. Step 2: Convert to fraction form
    103,840.80/155,530.80 = 41,479.20/x
  3. Step 3: Cross multiply
    103,840.80x = 155,530.80 × 41,479.20
  4. Step 4: Simplify right side
    103,840.80x = 6,451,293,159.36
  5. Step 5: Solve for x
    x = 6,451,293,159.36/103,840.80
  6. Step 6: Final answer
    x = 62,126.77

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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.