Home / 258,188.28-387,434-108,417.04

Finding the Fourth Proportional to 258,188.28, 387,434 and 108,417.04

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Solution

The fourth proportional to 258,188.28, 387,434 and 108,417.04 is: 162,689.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,188.28 : 387,434 = 108,417.04 : x
  2. Step 2: Convert to fraction form
    258,188.28/387,434 = 108,417.04/x
  3. Step 3: Cross multiply
    258,188.28x = 387,434 × 108,417.04
  4. Step 4: Simplify right side
    258,188.28x = 42,004,447,475.36
  5. Step 5: Solve for x
    x = 42,004,447,475.36/258,188.28
  6. Step 6: Final answer
    x = 162,689.21

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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.