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Finding the Fourth Proportional to 64,480.10, 96,720.15 and 42,361.70

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Solution

The fourth proportional to 64,480.10, 96,720.15 and 42,361.70 is: 63,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,480.10 : 96,720.15 = 42,361.70 : x
  2. Step 2: Convert to fraction form
    64,480.10/96,720.15 = 42,361.70/x
  3. Step 3: Cross multiply
    64,480.10x = 96,720.15 × 42,361.70
  4. Step 4: Simplify right side
    64,480.10x = 4,097,229,978.26
  5. Step 5: Solve for x
    x = 4,097,229,978.26/64,480.10
  6. Step 6: Final answer
    x = 63,542.55

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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.