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Finding the Fourth Proportional to 42,757.40, 64,136.10 and 34,981.40

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Solution

The fourth proportional to 42,757.40, 64,136.10 and 34,981.40 is: 52,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,757.40 : 64,136.10 = 34,981.40 : x
  2. Step 2: Convert to fraction form
    42,757.40/64,136.10 = 34,981.40/x
  3. Step 3: Cross multiply
    42,757.40x = 64,136.10 × 34,981.40
  4. Step 4: Simplify right side
    42,757.40x = 2,243,570,568.54
  5. Step 5: Solve for x
    x = 2,243,570,568.54/42,757.40
  6. Step 6: Final answer
    x = 52,472.10

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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.