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Finding the Fourth Proportional to 65,616.80, 90,527.49 and 42,968.70

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Solution

The fourth proportional to 65,616.80, 90,527.49 and 42,968.70 is: 59,281.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,616.80 : 90,527.49 = 42,968.70 : x
  2. Step 2: Convert to fraction form
    65,616.80/90,527.49 = 42,968.70/x
  3. Step 3: Cross multiply
    65,616.80x = 90,527.49 × 42,968.70
  4. Step 4: Simplify right side
    65,616.80x = 3,889,848,559.56
  5. Step 5: Solve for x
    x = 3,889,848,559.56/65,616.80
  6. Step 6: Final answer
    x = 59,281.29

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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.