Home / 245,689.20-339,023.28-138,256.92

Finding the Fourth Proportional to 245,689.20, 339,023.28 and 138,256.92

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Solution

The fourth proportional to 245,689.20, 339,023.28 and 138,256.92 is: 190,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,689.20 : 339,023.28 = 138,256.92 : x
  2. Step 2: Convert to fraction form
    245,689.20/339,023.28 = 138,256.92/x
  3. Step 3: Cross multiply
    245,689.20x = 339,023.28 × 138,256.92
  4. Step 4: Simplify right side
    245,689.20x = 46,872,314,501.10
  5. Step 5: Solve for x
    x = 46,872,314,501.10/245,689.20
  6. Step 6: Final answer
    x = 190,778.90

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1.5x scale

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.