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Finding the Fourth Proportional to 100,313.80, 138,428.88 and 60,003.74

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Solution

The fourth proportional to 100,313.80, 138,428.88 and 60,003.74 is: 82,802.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,313.80 : 138,428.88 = 60,003.74 : x
  2. Step 2: Convert to fraction form
    100,313.80/138,428.88 = 60,003.74/x
  3. Step 3: Cross multiply
    100,313.80x = 138,428.88 × 60,003.74
  4. Step 4: Simplify right side
    100,313.80x = 8,306,250,524.01
  5. Step 5: Solve for x
    x = 8,306,250,524.01/100,313.80
  6. Step 6: Final answer
    x = 82,802.67

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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.