Home / 257,558.21-355,432.95-142,839.12

Finding the Fourth Proportional to 257,558.21, 355,432.95 and 142,839.12

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Solution

The fourth proportional to 257,558.21, 355,432.95 and 142,839.12 is: 197,119.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,558.21 : 355,432.95 = 142,839.12 : x
  2. Step 2: Convert to fraction form
    257,558.21/355,432.95 = 142,839.12/x
  3. Step 3: Cross multiply
    257,558.21x = 355,432.95 × 142,839.12
  4. Step 4: Simplify right side
    257,558.21x = 50,769,729,929.35
  5. Step 5: Solve for x
    x = 50,769,729,929.35/257,558.21
  6. Step 6: Final answer
    x = 197,119.44

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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.