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Finding the Fourth Proportional to 357,078.85, 535,621.31 and 90,839.59

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Solution

The fourth proportional to 357,078.85, 535,621.31 and 90,839.59 is: 136,260.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,078.85 : 535,621.31 = 90,839.59 : x
  2. Step 2: Convert to fraction form
    357,078.85/535,621.31 = 90,839.59/x
  3. Step 3: Cross multiply
    357,078.85x = 535,621.31 × 90,839.59
  4. Step 4: Simplify right side
    357,078.85x = 48,655,620,195.66
  5. Step 5: Solve for x
    x = 48,655,620,195.66/357,078.85
  6. Step 6: Final answer
    x = 136,260.16

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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.