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Finding the Fourth Proportional to 90,686.52, 135,822.34 and 43,334.90

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Solution

The fourth proportional to 90,686.52, 135,822.34 and 43,334.90 is: 64,903.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,686.52 : 135,822.34 = 43,334.90 : x
  2. Step 2: Convert to fraction form
    90,686.52/135,822.34 = 43,334.90/x
  3. Step 3: Cross multiply
    90,686.52x = 135,822.34 × 43,334.90
  4. Step 4: Simplify right side
    90,686.52x = 5,885,847,521.67
  5. Step 5: Solve for x
    x = 5,885,847,521.67/90,686.52
  6. Step 6: Final answer
    x = 64,903.22

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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.