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Finding the Fourth Proportional to 100,505.52, 138,722.76 and 58,090.68

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Solution

The fourth proportional to 100,505.52, 138,722.76 and 58,090.68 is: 80,179.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,505.52 : 138,722.76 = 58,090.68 : x
  2. Step 2: Convert to fraction form
    100,505.52/138,722.76 = 58,090.68/x
  3. Step 3: Cross multiply
    100,505.52x = 138,722.76 × 58,090.68
  4. Step 4: Simplify right side
    100,505.52x = 8,058,499,459.88
  5. Step 5: Solve for x
    x = 8,058,499,459.88/100,505.52
  6. Step 6: Final answer
    x = 80,179.67

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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.