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Finding the Fourth Proportional to 203,545.40, 280,893.42 and 112,909.72

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Solution

The fourth proportional to 203,545.40, 280,893.42 and 112,909.72 is: 155,815.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,545.40 : 280,893.42 = 112,909.72 : x
  2. Step 2: Convert to fraction form
    203,545.40/280,893.42 = 112,909.72/x
  3. Step 3: Cross multiply
    203,545.40x = 280,893.42 × 112,909.72
  4. Step 4: Simplify right side
    203,545.40x = 31,715,597,402.04
  5. Step 5: Solve for x
    x = 31,715,597,402.04/203,545.40
  6. Step 6: Final answer
    x = 155,815.84

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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.