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Finding the Fourth Proportional to 109,993.12, 151,789.20 and 64,700.32

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Solution

The fourth proportional to 109,993.12, 151,789.20 and 64,700.32 is: 89,285.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,993.12 : 151,789.20 = 64,700.32 : x
  2. Step 2: Convert to fraction form
    109,993.12/151,789.20 = 64,700.32/x
  3. Step 3: Cross multiply
    109,993.12x = 151,789.20 × 64,700.32
  4. Step 4: Simplify right side
    109,993.12x = 9,820,809,812.54
  5. Step 5: Solve for x
    x = 9,820,809,812.54/109,993.12
  6. Step 6: Final answer
    x = 89,285.67

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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.