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Finding the Fourth Proportional to 158,719.60, 219,035.76 and 87,106.28

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Solution

The fourth proportional to 158,719.60, 219,035.76 and 87,106.28 is: 120,208.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,719.60 : 219,035.76 = 87,106.28 : x
  2. Step 2: Convert to fraction form
    158,719.60/219,035.76 = 87,106.28/x
  3. Step 3: Cross multiply
    158,719.60x = 219,035.76 × 87,106.28
  4. Step 4: Simplify right side
    158,719.60x = 19,079,390,240.57
  5. Step 5: Solve for x
    x = 19,079,390,240.57/158,719.60
  6. Step 6: Final answer
    x = 120,208.15

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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.