Home / 226,238.78-312,133.55-128,108.67

Finding the Fourth Proportional to 226,238.78, 312,133.55 and 128,108.67

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Solution

The fourth proportional to 226,238.78, 312,133.55 and 128,108.67 is: 176,746.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,238.78 : 312,133.55 = 128,108.67 : x
  2. Step 2: Convert to fraction form
    226,238.78/312,133.55 = 128,108.67/x
  3. Step 3: Cross multiply
    226,238.78x = 312,133.55 × 128,108.67
  4. Step 4: Simplify right side
    226,238.78x = 39,987,013,952.88
  5. Step 5: Solve for x
    x = 39,987,013,952.88/226,238.78
  6. Step 6: Final answer
    x = 176,746.95

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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.