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Finding the Fourth Proportional to 203,578.70, 280,938.36 and 112,948.40

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Solution

The fourth proportional to 203,578.70, 280,938.36 and 112,948.40 is: 155,868.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,578.70 : 280,938.36 = 112,948.40 : x
  2. Step 2: Convert to fraction form
    203,578.70/280,938.36 = 112,948.40/x
  3. Step 3: Cross multiply
    203,578.70x = 280,938.36 × 112,948.40
  4. Step 4: Simplify right side
    203,578.70x = 31,731,538,260.62
  5. Step 5: Solve for x
    x = 31,731,538,260.62/203,578.70
  6. Step 6: Final answer
    x = 155,868.66

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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.