Home / 282,639.12-390,023.64-161,781.36

Finding the Fourth Proportional to 282,639.12, 390,023.64 and 161,781.36

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Solution

The fourth proportional to 282,639.12, 390,023.64 and 161,781.36 is: 223,247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,639.12 : 390,023.64 = 161,781.36 : x
  2. Step 2: Convert to fraction form
    282,639.12/390,023.64 = 161,781.36/x
  3. Step 3: Cross multiply
    282,639.12x = 390,023.64 × 161,781.36
  4. Step 4: Simplify right side
    282,639.12x = 63,098,554,911.35
  5. Step 5: Solve for x
    x = 63,098,554,911.35/282,639.12
  6. Step 6: Final answer
    x = 223,247.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.