Home / 111,729.47-154,219.38-66,439.35

Finding the Fourth Proportional to 111,729.47, 154,219.38 and 66,439.35

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Solution

The fourth proportional to 111,729.47, 154,219.38 and 66,439.35 is: 91,705.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,729.47 : 154,219.38 = 66,439.35 : x
  2. Step 2: Convert to fraction form
    111,729.47/154,219.38 = 66,439.35/x
  3. Step 3: Cross multiply
    111,729.47x = 154,219.38 × 66,439.35
  4. Step 4: Simplify right side
    111,729.47x = 10,246,235,612.62
  5. Step 5: Solve for x
    x = 10,246,235,612.62/111,729.47
  6. Step 6: Final answer
    x = 91,705.75

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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.