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Finding the Fourth Proportional to 203,391, 280,679.58 and 118,491.66

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Solution

The fourth proportional to 203,391, 280,679.58 and 118,491.66 is: 163,518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,391 : 280,679.58 = 118,491.66 : x
  2. Step 2: Convert to fraction form
    203,391/280,679.58 = 118,491.66/x
  3. Step 3: Cross multiply
    203,391x = 280,679.58 × 118,491.66
  4. Step 4: Simplify right side
    203,391x = 33,258,189,362.30
  5. Step 5: Solve for x
    x = 33,258,189,362.30/203,391
  6. Step 6: Final answer
    x = 163,518.49

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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.