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Finding the Fourth Proportional to 90,643.95, 135,674.78 and 48,418.45

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Solution

The fourth proportional to 90,643.95, 135,674.78 and 48,418.45 is: 72,472.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,643.95 : 135,674.78 = 48,418.45 : x
  2. Step 2: Convert to fraction form
    90,643.95/135,674.78 = 48,418.45/x
  3. Step 3: Cross multiply
    90,643.95x = 135,674.78 × 48,418.45
  4. Step 4: Simplify right side
    90,643.95x = 6,569,162,551.69
  5. Step 5: Solve for x
    x = 6,569,162,551.69/90,643.95
  6. Step 6: Final answer
    x = 72,472.16

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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.