Home / 138,138.76-190,660.26-90,303.40

Finding the Fourth Proportional to 138,138.76, 190,660.26 and 90,303.40

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Solution

The fourth proportional to 138,138.76, 190,660.26 and 90,303.40 is: 124,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,138.76 : 190,660.26 = 90,303.40 : x
  2. Step 2: Convert to fraction form
    138,138.76/190,660.26 = 90,303.40/x
  3. Step 3: Cross multiply
    138,138.76x = 190,660.26 × 90,303.40
  4. Step 4: Simplify right side
    138,138.76x = 17,217,269,722.88
  5. Step 5: Solve for x
    x = 17,217,269,722.88/138,138.76
  6. Step 6: Final answer
    x = 124,637.50

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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.