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Finding the Fourth Proportional to 113,628.64, 156,812.88 and 63,328

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Solution

The fourth proportional to 113,628.64, 156,812.88 and 63,328 is: 87,395.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,628.64 : 156,812.88 = 63,328 : x
  2. Step 2: Convert to fraction form
    113,628.64/156,812.88 = 63,328/x
  3. Step 3: Cross multiply
    113,628.64x = 156,812.88 × 63,328
  4. Step 4: Simplify right side
    113,628.64x = 9,930,646,064.64
  5. Step 5: Solve for x
    x = 9,930,646,064.64/113,628.64
  6. Step 6: Final answer
    x = 87,395.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.