Home / 154,320.39-212,866.79-105,900.21

Finding the Fourth Proportional to 154,320.39, 212,866.79 and 105,900.21

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Solution

The fourth proportional to 154,320.39, 212,866.79 and 105,900.21 is: 146,076.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,320.39 : 212,866.79 = 105,900.21 : x
  2. Step 2: Convert to fraction form
    154,320.39/212,866.79 = 105,900.21/x
  3. Step 3: Cross multiply
    154,320.39x = 212,866.79 × 105,900.21
  4. Step 4: Simplify right side
    154,320.39x = 22,542,637,233.52
  5. Step 5: Solve for x
    x = 22,542,637,233.52/154,320.39
  6. Step 6: Final answer
    x = 146,076.85

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1.5x scale

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.