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Finding the Fourth Proportional to 203,253, 280,488.60 and 112,609.20

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Solution

The fourth proportional to 203,253, 280,488.60 and 112,609.20 is: 155,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,253 : 280,488.60 = 112,609.20 : x
  2. Step 2: Convert to fraction form
    203,253/280,488.60 = 112,609.20/x
  3. Step 3: Cross multiply
    203,253x = 280,488.60 × 112,609.20
  4. Step 4: Simplify right side
    203,253x = 31,585,596,855.12
  5. Step 5: Solve for x
    x = 31,585,596,855.12/203,253
  6. Step 6: Final answer
    x = 155,400.40

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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.