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Finding the Fourth Proportional to 259,847.70, 390,099.60 and 140,000.10

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Solution

The fourth proportional to 259,847.70, 390,099.60 and 140,000.10 is: 210,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,847.70 : 390,099.60 = 140,000.10 : x
  2. Step 2: Convert to fraction form
    259,847.70/390,099.60 = 140,000.10/x
  3. Step 3: Cross multiply
    259,847.70x = 390,099.60 × 140,000.10
  4. Step 4: Simplify right side
    259,847.70x = 54,613,983,009.96
  5. Step 5: Solve for x
    x = 54,613,983,009.96/259,847.70
  6. Step 6: Final answer
    x = 210,176.90

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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.