Home / 109,488.40-150,959.76-90,039.36

Finding the Fourth Proportional to 109,488.40, 150,959.76 and 90,039.36

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Solution

The fourth proportional to 109,488.40, 150,959.76 and 90,039.36 is: 124,143.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,488.40 : 150,959.76 = 90,039.36 : x
  2. Step 2: Convert to fraction form
    109,488.40/150,959.76 = 90,039.36/x
  3. Step 3: Cross multiply
    109,488.40x = 150,959.76 × 90,039.36
  4. Step 4: Simplify right side
    109,488.40x = 13,592,320,176.15
  5. Step 5: Solve for x
    x = 13,592,320,176.15/109,488.40
  6. Step 6: Final answer
    x = 124,143.93

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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.