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Finding the Fourth Proportional to 250,455.18, 375,718.11 and 81,989.16

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Solution

The fourth proportional to 250,455.18, 375,718.11 and 81,989.16 is: 122,995.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,455.18 : 375,718.11 = 81,989.16 : x
  2. Step 2: Convert to fraction form
    250,455.18/375,718.11 = 81,989.16/x
  3. Step 3: Cross multiply
    250,455.18x = 375,718.11 × 81,989.16
  4. Step 4: Simplify right side
    250,455.18x = 30,804,812,235.69
  5. Step 5: Solve for x
    x = 30,804,812,235.69/250,455.18
  6. Step 6: Final answer
    x = 122,995.31

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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.