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Finding the Fourth Proportional to 117,896.31, 162,386.88 and 90,620.17

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Solution

The fourth proportional to 117,896.31, 162,386.88 and 90,620.17 is: 124,817.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,896.31 : 162,386.88 = 90,620.17 : x
  2. Step 2: Convert to fraction form
    117,896.31/162,386.88 = 90,620.17/x
  3. Step 3: Cross multiply
    117,896.31x = 162,386.88 × 90,620.17
  4. Step 4: Simplify right side
    117,896.31x = 14,715,525,925.58
  5. Step 5: Solve for x
    x = 14,715,525,925.58/117,896.31
  6. Step 6: Final answer
    x = 124,817.53

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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.