Home / 112,905.84-169,324.12-78,069.36

Finding the Fourth Proportional to 112,905.84, 169,324.12 and 78,069.36

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Solution

The fourth proportional to 112,905.84, 169,324.12 and 78,069.36 is: 117,080.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,905.84 : 169,324.12 = 78,069.36 : x
  2. Step 2: Convert to fraction form
    112,905.84/169,324.12 = 78,069.36/x
  3. Step 3: Cross multiply
    112,905.84x = 169,324.12 × 78,069.36
  4. Step 4: Simplify right side
    112,905.84x = 13,219,025,680.96
  5. Step 5: Solve for x
    x = 13,219,025,680.96/112,905.84
  6. Step 6: Final answer
    x = 117,080.09

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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.