Home / 280,139.79-386,625.17-155,973.27

Finding the Fourth Proportional to 280,139.79, 386,625.17 and 155,973.27

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Solution

The fourth proportional to 280,139.79, 386,625.17 and 155,973.27 is: 215,261.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,139.79 : 386,625.17 = 155,973.27 : x
  2. Step 2: Convert to fraction form
    280,139.79/386,625.17 = 155,973.27/x
  3. Step 3: Cross multiply
    280,139.79x = 386,625.17 × 155,973.27
  4. Step 4: Simplify right side
    280,139.79x = 60,303,192,029.21
  5. Step 5: Solve for x
    x = 60,303,192,029.21/280,139.79
  6. Step 6: Final answer
    x = 215,261.07

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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.