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Finding the Fourth Proportional to 203,420.71, 280,737.21 and 112,805.10

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Solution

The fourth proportional to 203,420.71, 280,737.21 and 112,805.10 is: 155,680.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,420.71 : 280,737.21 = 112,805.10 : x
  2. Step 2: Convert to fraction form
    203,420.71/280,737.21 = 112,805.10/x
  3. Step 3: Cross multiply
    203,420.71x = 280,737.21 × 112,805.10
  4. Step 4: Simplify right side
    203,420.71x = 31,668,587,644.09
  5. Step 5: Solve for x
    x = 31,668,587,644.09/203,420.71
  6. Step 6: Final answer
    x = 155,680.25

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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.