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Finding the Fourth Proportional to 104,074.80, 155,881.80 and 85,642.80

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Solution

The fourth proportional to 104,074.80, 155,881.80 and 85,642.80 is: 128,274.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,074.80 : 155,881.80 = 85,642.80 : x
  2. Step 2: Convert to fraction form
    104,074.80/155,881.80 = 85,642.80/x
  3. Step 3: Cross multiply
    104,074.80x = 155,881.80 × 85,642.80
  4. Step 4: Simplify right side
    104,074.80x = 13,350,153,821.04
  5. Step 5: Solve for x
    x = 13,350,153,821.04/104,074.80
  6. Step 6: Final answer
    x = 128,274.60

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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.