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Finding the Fourth Proportional to 65,561.40, 90,473.76 and 36,878.90

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Solution

The fourth proportional to 65,561.40, 90,473.76 and 36,878.90 is: 50,892.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,561.40 : 90,473.76 = 36,878.90 : x
  2. Step 2: Convert to fraction form
    65,561.40/90,473.76 = 36,878.90/x
  3. Step 3: Cross multiply
    65,561.40x = 90,473.76 × 36,878.90
  4. Step 4: Simplify right side
    65,561.40x = 3,336,572,295.30
  5. Step 5: Solve for x
    x = 3,336,572,295.30/65,561.40
  6. Step 6: Final answer
    x = 50,892.33

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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.