Home / 259,808.40-389,631.60-102,085.20

Finding the Fourth Proportional to 259,808.40, 389,631.60 and 102,085.20

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Solution

The fourth proportional to 259,808.40, 389,631.60 and 102,085.20 is: 153,095.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,808.40 : 389,631.60 = 102,085.20 : x
  2. Step 2: Convert to fraction form
    259,808.40/389,631.60 = 102,085.20/x
  3. Step 3: Cross multiply
    259,808.40x = 389,631.60 × 102,085.20
  4. Step 4: Simplify right side
    259,808.40x = 39,775,619,812.32
  5. Step 5: Solve for x
    x = 39,775,619,812.32/259,808.40
  6. Step 6: Final answer
    x = 153,095.97

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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.