Home / 100,579.32-138,795.66-55,870.20

Finding the Fourth Proportional to 100,579.32, 138,795.66 and 55,870.20

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Solution

The fourth proportional to 100,579.32, 138,795.66 and 55,870.20 is: 77,098.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,579.32 : 138,795.66 = 55,870.20 : x
  2. Step 2: Convert to fraction form
    100,579.32/138,795.66 = 55,870.20/x
  3. Step 3: Cross multiply
    100,579.32x = 138,795.66 × 55,870.20
  4. Step 4: Simplify right side
    100,579.32x = 7,754,541,283.33
  5. Step 5: Solve for x
    x = 7,754,541,283.33/100,579.32
  6. Step 6: Final answer
    x = 77,098.76

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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.