Home / 112,254.81-154,872.56-71,990.78

Finding the Fourth Proportional to 112,254.81, 154,872.56 and 71,990.78

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Solution

The fourth proportional to 112,254.81, 154,872.56 and 71,990.78 is: 99,322.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,254.81 : 154,872.56 = 71,990.78 : x
  2. Step 2: Convert to fraction form
    112,254.81/154,872.56 = 71,990.78/x
  3. Step 3: Cross multiply
    112,254.81x = 154,872.56 × 71,990.78
  4. Step 4: Simplify right side
    112,254.81x = 11,149,395,395.66
  5. Step 5: Solve for x
    x = 11,149,395,395.66/112,254.81
  6. Step 6: Final answer
    x = 99,322.20

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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.