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Finding the Fourth Proportional to 113,688.64, 156,891.36 and 68,368

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Solution

The fourth proportional to 113,688.64, 156,891.36 and 68,368 is: 94,348.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,688.64 : 156,891.36 = 68,368 : x
  2. Step 2: Convert to fraction form
    113,688.64/156,891.36 = 68,368/x
  3. Step 3: Cross multiply
    113,688.64x = 156,891.36 × 68,368
  4. Step 4: Simplify right side
    113,688.64x = 10,726,348,500.48
  5. Step 5: Solve for x
    x = 10,726,348,500.48/113,688.64
  6. Step 6: Final answer
    x = 94,348.46

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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.