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Finding the Fourth Proportional to 100,518.94, 138,719.37 and 58,077.47

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Solution

The fourth proportional to 100,518.94, 138,719.37 and 58,077.47 is: 80,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,518.94 : 138,719.37 = 58,077.47 : x
  2. Step 2: Convert to fraction form
    100,518.94/138,719.37 = 58,077.47/x
  3. Step 3: Cross multiply
    100,518.94x = 138,719.37 × 58,077.47
  4. Step 4: Simplify right side
    100,518.94x = 8,056,470,049.59
  5. Step 5: Solve for x
    x = 8,056,470,049.59/100,518.94
  6. Step 6: Final answer
    x = 80,148.78

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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.