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Finding the Fourth Proportional to 203,507.55, 280,854.72 and 112,872.15

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Solution

The fourth proportional to 203,507.55, 280,854.72 and 112,872.15 is: 155,771.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,507.55 : 280,854.72 = 112,872.15 : x
  2. Step 2: Convert to fraction form
    203,507.55/280,854.72 = 112,872.15/x
  3. Step 3: Cross multiply
    203,507.55x = 280,854.72 × 112,872.15
  4. Step 4: Simplify right side
    203,507.55x = 31,700,676,084.05
  5. Step 5: Solve for x
    x = 31,700,676,084.05/203,507.55
  6. Step 6: Final answer
    x = 155,771.50

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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.