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Finding the Fourth Proportional to 70,120.92, 105,155.44 and 20,184.16

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Solution

The fourth proportional to 70,120.92, 105,155.44 and 20,184.16 is: 30,268.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,120.92 : 105,155.44 = 20,184.16 : x
  2. Step 2: Convert to fraction form
    70,120.92/105,155.44 = 20,184.16/x
  3. Step 3: Cross multiply
    70,120.92x = 105,155.44 × 20,184.16
  4. Step 4: Simplify right side
    70,120.92x = 2,122,474,225.83
  5. Step 5: Solve for x
    x = 2,122,474,225.83/70,120.92
  6. Step 6: Final answer
    x = 30,268.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.