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Finding the Fourth Proportional to 64,515.60, 96,643.80 and 36,781.20

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Solution

The fourth proportional to 64,515.60, 96,643.80 and 36,781.20 is: 55,097.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,515.60 : 96,643.80 = 36,781.20 : x
  2. Step 2: Convert to fraction form
    64,515.60/96,643.80 = 36,781.20/x
  3. Step 3: Cross multiply
    64,515.60x = 96,643.80 × 36,781.20
  4. Step 4: Simplify right side
    64,515.60x = 3,554,674,936.56
  5. Step 5: Solve for x
    x = 3,554,674,936.56/64,515.60
  6. Step 6: Final answer
    x = 55,097.91

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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.