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Finding the Fourth Proportional to 203,417.70, 305,126.55 and 140,432.10

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Solution

The fourth proportional to 203,417.70, 305,126.55 and 140,432.10 is: 210,648.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,417.70 : 305,126.55 = 140,432.10 : x
  2. Step 2: Convert to fraction form
    203,417.70/305,126.55 = 140,432.10/x
  3. Step 3: Cross multiply
    203,417.70x = 305,126.55 × 140,432.10
  4. Step 4: Simplify right side
    203,417.70x = 42,849,562,182.26
  5. Step 5: Solve for x
    x = 42,849,562,182.26/203,417.70
  6. Step 6: Final answer
    x = 210,648.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.