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Finding the Fourth Proportional to 90,809.82, 125,334.81 and 56,834.10

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Solution

The fourth proportional to 90,809.82, 125,334.81 and 56,834.10 is: 78,441.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,809.82 : 125,334.81 = 56,834.10 : x
  2. Step 2: Convert to fraction form
    90,809.82/125,334.81 = 56,834.10/x
  3. Step 3: Cross multiply
    90,809.82x = 125,334.81 × 56,834.10
  4. Step 4: Simplify right side
    90,809.82x = 7,123,291,125.02
  5. Step 5: Solve for x
    x = 7,123,291,125.02/90,809.82
  6. Step 6: Final answer
    x = 78,441.86

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1.5x scale

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.