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Finding the Fourth Proportional to 231,190.80, 346,699.80 and 90,920.40

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Solution

The fourth proportional to 231,190.80, 346,699.80 and 90,920.40 is: 136,346.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,190.80 : 346,699.80 = 90,920.40 : x
  2. Step 2: Convert to fraction form
    231,190.80/346,699.80 = 90,920.40/x
  3. Step 3: Cross multiply
    231,190.80x = 346,699.80 × 90,920.40
  4. Step 4: Simplify right side
    231,190.80x = 31,522,084,495.92
  5. Step 5: Solve for x
    x = 31,522,084,495.92/231,190.80
  6. Step 6: Final answer
    x = 136,346.62

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1.5x scale

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.