Home / 57,145.02-85,568.43-45,990.78

Finding the Fourth Proportional to 57,145.02, 85,568.43 and 45,990.78

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Solution

The fourth proportional to 57,145.02, 85,568.43 and 45,990.78 is: 68,866.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,145.02 : 85,568.43 = 45,990.78 : x
  2. Step 2: Convert to fraction form
    57,145.02/85,568.43 = 45,990.78/x
  3. Step 3: Cross multiply
    57,145.02x = 85,568.43 × 45,990.78
  4. Step 4: Simplify right side
    57,145.02x = 3,935,358,839.08
  5. Step 5: Solve for x
    x = 3,935,358,839.08/57,145.02
  6. Step 6: Final answer
    x = 68,866.17

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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.