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Finding the Fourth Proportional to 158,722.54, 219,039.78 and 87,109.22

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Solution

The fourth proportional to 158,722.54, 219,039.78 and 87,109.22 is: 120,212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,722.54 : 219,039.78 = 87,109.22 : x
  2. Step 2: Convert to fraction form
    158,722.54/219,039.78 = 87,109.22/x
  3. Step 3: Cross multiply
    158,722.54x = 219,039.78 × 87,109.22
  4. Step 4: Simplify right side
    158,722.54x = 19,080,384,384.77
  5. Step 5: Solve for x
    x = 19,080,384,384.77/158,722.54
  6. Step 6: Final answer
    x = 120,212.19

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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.