Home / 138,931.20-191,462.40-136,857.60

Finding the Fourth Proportional to 138,931.20, 191,462.40 and 136,857.60

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Solution

The fourth proportional to 138,931.20, 191,462.40 and 136,857.60 is: 188,604.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,931.20 : 191,462.40 = 136,857.60 : x
  2. Step 2: Convert to fraction form
    138,931.20/191,462.40 = 136,857.60/x
  3. Step 3: Cross multiply
    138,931.20x = 191,462.40 × 136,857.60
  4. Step 4: Simplify right side
    138,931.20x = 26,203,084,554.24
  5. Step 5: Solve for x
    x = 26,203,084,554.24/138,931.20
  6. Step 6: Final answer
    x = 188,604.75

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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.