Home / 158,128.11-218,288.05-100,844.30

Finding the Fourth Proportional to 158,128.11, 218,288.05 and 100,844.30

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Solution

The fourth proportional to 158,128.11, 218,288.05 and 100,844.30 is: 139,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,128.11 : 218,288.05 = 100,844.30 : x
  2. Step 2: Convert to fraction form
    158,128.11/218,288.05 = 100,844.30/x
  3. Step 3: Cross multiply
    158,128.11x = 218,288.05 × 100,844.30
  4. Step 4: Simplify right side
    158,128.11x = 22,013,105,894.22
  5. Step 5: Solve for x
    x = 22,013,105,894.22/158,128.11
  6. Step 6: Final answer
    x = 139,210.58

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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.