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Finding the Fourth Proportional to 104,073.80, 155,880.30 and 85,641.80

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Solution

The fourth proportional to 104,073.80, 155,880.30 and 85,641.80 is: 128,273.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,073.80 : 155,880.30 = 85,641.80 : x
  2. Step 2: Convert to fraction form
    104,073.80/155,880.30 = 85,641.80/x
  3. Step 3: Cross multiply
    104,073.80x = 155,880.30 × 85,641.80
  4. Step 4: Simplify right side
    104,073.80x = 13,349,869,476.54
  5. Step 5: Solve for x
    x = 13,349,869,476.54/104,073.80
  6. Step 6: Final answer
    x = 128,273.11

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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.