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Finding the Fourth Proportional to 103,688.48, 155,531.68 and 47,512.64

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Solution

The fourth proportional to 103,688.48, 155,531.68 and 47,512.64 is: 71,268.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,688.48 : 155,531.68 = 47,512.64 : x
  2. Step 2: Convert to fraction form
    103,688.48/155,531.68 = 47,512.64/x
  3. Step 3: Cross multiply
    103,688.48x = 155,531.68 × 47,512.64
  4. Step 4: Simplify right side
    103,688.48x = 7,389,720,720.44
  5. Step 5: Solve for x
    x = 7,389,720,720.44/103,688.48
  6. Step 6: Final answer
    x = 71,268.48

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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.