Home / 100,275.20-138,382.56-55,563.20

Finding the Fourth Proportional to 100,275.20, 138,382.56 and 55,563.20

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Solution

The fourth proportional to 100,275.20, 138,382.56 and 55,563.20 is: 76,678.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,275.20 : 138,382.56 = 55,563.20 : x
  2. Step 2: Convert to fraction form
    100,275.20/138,382.56 = 55,563.20/x
  3. Step 3: Cross multiply
    100,275.20x = 138,382.56 × 55,563.20
  4. Step 4: Simplify right side
    100,275.20x = 7,688,977,857.79
  5. Step 5: Solve for x
    x = 7,688,977,857.79/100,275.20
  6. Step 6: Final answer
    x = 76,678.76

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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.