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Finding the Fourth Proportional to 65,635.71, 90,528.93 and 49,503.71

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Solution

The fourth proportional to 65,635.71, 90,528.93 and 49,503.71 is: 68,278.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,635.71 : 90,528.93 = 49,503.71 : x
  2. Step 2: Convert to fraction form
    65,635.71/90,528.93 = 49,503.71/x
  3. Step 3: Cross multiply
    65,635.71x = 90,528.93 × 49,503.71
  4. Step 4: Simplify right side
    65,635.71x = 4,481,517,444.69
  5. Step 5: Solve for x
    x = 4,481,517,444.69/65,635.71
  6. Step 6: Final answer
    x = 68,278.65

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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.