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Finding the Fourth Proportional to 42,701.80, 64,052.70 and 40,660.60

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Solution

The fourth proportional to 42,701.80, 64,052.70 and 40,660.60 is: 60,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,701.80 : 64,052.70 = 40,660.60 : x
  2. Step 2: Convert to fraction form
    42,701.80/64,052.70 = 40,660.60/x
  3. Step 3: Cross multiply
    42,701.80x = 64,052.70 × 40,660.60
  4. Step 4: Simplify right side
    42,701.80x = 2,604,421,213.62
  5. Step 5: Solve for x
    x = 2,604,421,213.62/42,701.80
  6. Step 6: Final answer
    x = 60,990.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.