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Finding the Fourth Proportional to 260,021.70, 390,162.15 and 147,788.10

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Solution

The fourth proportional to 260,021.70, 390,162.15 and 147,788.10 is: 221,755.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,021.70 : 390,162.15 = 147,788.10 : x
  2. Step 2: Convert to fraction form
    260,021.70/390,162.15 = 147,788.10/x
  3. Step 3: Cross multiply
    260,021.70x = 390,162.15 × 147,788.10
  4. Step 4: Simplify right side
    260,021.70x = 57,661,322,840.42
  5. Step 5: Solve for x
    x = 57,661,322,840.42/260,021.70
  6. Step 6: Final answer
    x = 221,755.81

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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.