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Finding the Fourth Proportional to 64,361.60, 96,542.40 and 17,619.20

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Solution

The fourth proportional to 64,361.60, 96,542.40 and 17,619.20 is: 26,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,361.60 : 96,542.40 = 17,619.20 : x
  2. Step 2: Convert to fraction form
    64,361.60/96,542.40 = 17,619.20/x
  3. Step 3: Cross multiply
    64,361.60x = 96,542.40 × 17,619.20
  4. Step 4: Simplify right side
    64,361.60x = 1,700,999,854.08
  5. Step 5: Solve for x
    x = 1,700,999,854.08/64,361.60
  6. Step 6: Final answer
    x = 26,428.80

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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.