Home / 81,607.65-122,313.01-42,143.19

Finding the Fourth Proportional to 81,607.65, 122,313.01 and 42,143.19

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Solution

The fourth proportional to 81,607.65, 122,313.01 and 42,143.19 is: 63,163.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607.65 : 122,313.01 = 42,143.19 : x
  2. Step 2: Convert to fraction form
    81,607.65/122,313.01 = 42,143.19/x
  3. Step 3: Cross multiply
    81,607.65x = 122,313.01 × 42,143.19
  4. Step 4: Simplify right side
    81,607.65x = 5,154,660,419.90
  5. Step 5: Solve for x
    x = 5,154,660,419.90/81,607.65
  6. Step 6: Final answer
    x = 63,163.94

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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.