Home / 154,309.40-212,861.23-89,771.39

Finding the Fourth Proportional to 154,309.40, 212,861.23 and 89,771.39

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Solution

The fourth proportional to 154,309.40, 212,861.23 and 89,771.39 is: 123,834.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,309.40 : 212,861.23 = 89,771.39 : x
  2. Step 2: Convert to fraction form
    154,309.40/212,861.23 = 89,771.39/x
  3. Step 3: Cross multiply
    154,309.40x = 212,861.23 × 89,771.39
  4. Step 4: Simplify right side
    154,309.40x = 19,108,848,494.21
  5. Step 5: Solve for x
    x = 19,108,848,494.21/154,309.40
  6. Step 6: Final answer
    x = 123,834.64

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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.