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Finding the Fourth Proportional to 129,040.80, 193,330.80 and 109,226.40

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Solution

The fourth proportional to 129,040.80, 193,330.80 and 109,226.40 is: 163,644.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,040.80 : 193,330.80 = 109,226.40 : x
  2. Step 2: Convert to fraction form
    129,040.80/193,330.80 = 109,226.40/x
  3. Step 3: Cross multiply
    129,040.80x = 193,330.80 × 109,226.40
  4. Step 4: Simplify right side
    129,040.80x = 21,116,827,293.12
  5. Step 5: Solve for x
    x = 21,116,827,293.12/129,040.80
  6. Step 6: Final answer
    x = 163,644.58

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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.