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Finding the Fourth Proportional to 70,641.32, 105,863.46 and 53,090.60

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Solution

The fourth proportional to 70,641.32, 105,863.46 and 53,090.60 is: 79,561.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,641.32 : 105,863.46 = 53,090.60 : x
  2. Step 2: Convert to fraction form
    70,641.32/105,863.46 = 53,090.60/x
  3. Step 3: Cross multiply
    70,641.32x = 105,863.46 × 53,090.60
  4. Step 4: Simplify right side
    70,641.32x = 5,620,354,609.48
  5. Step 5: Solve for x
    x = 5,620,354,609.48/70,641.32
  6. Step 6: Final answer
    x = 79,561.86

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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.