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Finding the Fourth Proportional to 70,360.60, 105,516.60 and 20,427.16

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Solution

The fourth proportional to 70,360.60, 105,516.60 and 20,427.16 is: 30,633.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,360.60 : 105,516.60 = 20,427.16 : x
  2. Step 2: Convert to fraction form
    70,360.60/105,516.60 = 20,427.16/x
  3. Step 3: Cross multiply
    70,360.60x = 105,516.60 × 20,427.16
  4. Step 4: Simplify right side
    70,360.60x = 2,155,404,470.86
  5. Step 5: Solve for x
    x = 2,155,404,470.86/70,360.60
  6. Step 6: Final answer
    x = 30,633.69

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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.