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Finding the Fourth Proportional to 92,767.68, 128,069.01 and 72,581.67

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Solution

The fourth proportional to 92,767.68, 128,069.01 and 72,581.67 is: 100,201.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,767.68 : 128,069.01 = 72,581.67 : x
  2. Step 2: Convert to fraction form
    92,767.68/128,069.01 = 72,581.67/x
  3. Step 3: Cross multiply
    92,767.68x = 128,069.01 × 72,581.67
  4. Step 4: Simplify right side
    92,767.68x = 9,295,462,621.05
  5. Step 5: Solve for x
    x = 9,295,462,621.05/92,767.68
  6. Step 6: Final answer
    x = 100,201.52

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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.