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Finding the Fourth Proportional to 203,459.79, 280,748.70 and 111,554.89

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Solution

The fourth proportional to 203,459.79, 280,748.70 and 111,554.89 is: 153,931.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,459.79 : 280,748.70 = 111,554.89 : x
  2. Step 2: Convert to fraction form
    203,459.79/280,748.70 = 111,554.89/x
  3. Step 3: Cross multiply
    203,459.79x = 280,748.70 × 111,554.89
  4. Step 4: Simplify right side
    203,459.79x = 31,318,890,346.14
  5. Step 5: Solve for x
    x = 31,318,890,346.14/203,459.79
  6. Step 6: Final answer
    x = 153,931.60

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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.