Home / 130,486.94-180,158.70-100,218.18

Finding the Fourth Proportional to 130,486.94, 180,158.70 and 100,218.18

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Solution

The fourth proportional to 130,486.94, 180,158.70 and 100,218.18 is: 138,367.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,486.94 : 180,158.70 = 100,218.18 : x
  2. Step 2: Convert to fraction form
    130,486.94/180,158.70 = 100,218.18/x
  3. Step 3: Cross multiply
    130,486.94x = 180,158.70 × 100,218.18
  4. Step 4: Simplify right side
    130,486.94x = 18,055,177,025.17
  5. Step 5: Solve for x
    x = 18,055,177,025.17/130,486.94
  6. Step 6: Final answer
    x = 138,367.69

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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.