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Finding the Fourth Proportional to 122,113.65, 168,511.85 and 68,397.81

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Solution

The fourth proportional to 122,113.65, 168,511.85 and 68,397.81 is: 94,386.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,113.65 : 168,511.85 = 68,397.81 : x
  2. Step 2: Convert to fraction form
    122,113.65/168,511.85 = 68,397.81/x
  3. Step 3: Cross multiply
    122,113.65x = 168,511.85 × 68,397.81
  4. Step 4: Simplify right side
    122,113.65x = 11,525,841,157.06
  5. Step 5: Solve for x
    x = 11,525,841,157.06/122,113.65
  6. Step 6: Final answer
    x = 94,386.18

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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.