Home / 103,138.20-154,707.30-90,672.30

Finding the Fourth Proportional to 103,138.20, 154,707.30 and 90,672.30

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Solution

The fourth proportional to 103,138.20, 154,707.30 and 90,672.30 is: 136,008.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,138.20 : 154,707.30 = 90,672.30 : x
  2. Step 2: Convert to fraction form
    103,138.20/154,707.30 = 90,672.30/x
  3. Step 3: Cross multiply
    103,138.20x = 154,707.30 × 90,672.30
  4. Step 4: Simplify right side
    103,138.20x = 14,027,666,717.79
  5. Step 5: Solve for x
    x = 14,027,666,717.79/103,138.20
  6. Step 6: Final answer
    x = 136,008.45

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1.5x scale

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.