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Finding the Fourth Proportional to 65,749.60, 90,737.60 and 40,247.84

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Solution

The fourth proportional to 65,749.60, 90,737.60 and 40,247.84 is: 55,543.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,749.60 : 90,737.60 = 40,247.84 : x
  2. Step 2: Convert to fraction form
    65,749.60/90,737.60 = 40,247.84/x
  3. Step 3: Cross multiply
    65,749.60x = 90,737.60 × 40,247.84
  4. Step 4: Simplify right side
    65,749.60x = 3,651,992,406.78
  5. Step 5: Solve for x
    x = 3,651,992,406.78/65,749.60
  6. Step 6: Final answer
    x = 55,543.95

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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.