Home / 120,007.70-180,011.55-109,121.30

Finding the Fourth Proportional to 120,007.70, 180,011.55 and 109,121.30

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Solution

The fourth proportional to 120,007.70, 180,011.55 and 109,121.30 is: 163,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,007.70 : 180,011.55 = 109,121.30 : x
  2. Step 2: Convert to fraction form
    120,007.70/180,011.55 = 109,121.30/x
  3. Step 3: Cross multiply
    120,007.70x = 180,011.55 × 109,121.30
  4. Step 4: Simplify right side
    120,007.70x = 19,643,094,351.02
  5. Step 5: Solve for x
    x = 19,643,094,351.02/120,007.70
  6. Step 6: Final answer
    x = 163,681.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.