Home / 154,307.56-212,935.84-86,311.38

Finding the Fourth Proportional to 154,307.56, 212,935.84 and 86,311.38

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Solution

The fourth proportional to 154,307.56, 212,935.84 and 86,311.38 is: 119,104.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,307.56 : 212,935.84 = 86,311.38 : x
  2. Step 2: Convert to fraction form
    154,307.56/212,935.84 = 86,311.38/x
  3. Step 3: Cross multiply
    154,307.56x = 212,935.84 × 86,311.38
  4. Step 4: Simplify right side
    154,307.56x = 18,378,786,201.86
  5. Step 5: Solve for x
    x = 18,378,786,201.86/154,307.56
  6. Step 6: Final answer
    x = 119,104.90

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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.