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Finding the Fourth Proportional to 113,701.97, 156,970.24 and 68,390.07

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Solution

The fourth proportional to 113,701.97, 156,970.24 and 68,390.07 is: 94,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,701.97 : 156,970.24 = 68,390.07 : x
  2. Step 2: Convert to fraction form
    113,701.97/156,970.24 = 68,390.07/x
  3. Step 3: Cross multiply
    113,701.97x = 156,970.24 × 68,390.07
  4. Step 4: Simplify right side
    113,701.97x = 10,735,205,701.52
  5. Step 5: Solve for x
    x = 10,735,205,701.52/113,701.97
  6. Step 6: Final answer
    x = 94,415.30

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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.