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Finding the Fourth Proportional to 153,581.60, 211,959.78 and 85,604.78

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Solution

The fourth proportional to 153,581.60, 211,959.78 and 85,604.78 is: 118,144.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,581.60 : 211,959.78 = 85,604.78 : x
  2. Step 2: Convert to fraction form
    153,581.60/211,959.78 = 85,604.78/x
  3. Step 3: Cross multiply
    153,581.60x = 211,959.78 × 85,604.78
  4. Step 4: Simplify right side
    153,581.60x = 18,144,770,335.75
  5. Step 5: Solve for x
    x = 18,144,770,335.75/153,581.60
  6. Step 6: Final answer
    x = 118,144.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.