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Finding the Fourth Proportional to 72,788.72, 100,459.32 and 68,285.84

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Solution

The fourth proportional to 72,788.72, 100,459.32 and 68,285.84 is: 94,244.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,788.72 : 100,459.32 = 68,285.84 : x
  2. Step 2: Convert to fraction form
    72,788.72/100,459.32 = 68,285.84/x
  3. Step 3: Cross multiply
    72,788.72x = 100,459.32 × 68,285.84
  4. Step 4: Simplify right side
    72,788.72x = 6,859,949,052.03
  5. Step 5: Solve for x
    x = 6,859,949,052.03/72,788.72
  6. Step 6: Final answer
    x = 94,244.67

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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.