Home / 154,320.20-212,960.80-86,336.84

Finding the Fourth Proportional to 154,320.20, 212,960.80 and 86,336.84

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Solution

The fourth proportional to 154,320.20, 212,960.80 and 86,336.84 is: 119,144.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,320.20 : 212,960.80 = 86,336.84 : x
  2. Step 2: Convert to fraction form
    154,320.20/212,960.80 = 86,336.84/x
  3. Step 3: Cross multiply
    154,320.20x = 212,960.80 × 86,336.84
  4. Step 4: Simplify right side
    154,320.20x = 18,386,362,515.87
  5. Step 5: Solve for x
    x = 18,386,362,515.87/154,320.20
  6. Step 6: Final answer
    x = 119,144.24

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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.