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Finding the Fourth Proportional to 121,762.08, 168,030 and 68,047.92

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Solution

The fourth proportional to 121,762.08, 168,030 and 68,047.92 is: 93,905.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,762.08 : 168,030 = 68,047.92 : x
  2. Step 2: Convert to fraction form
    121,762.08/168,030 = 68,047.92/x
  3. Step 3: Cross multiply
    121,762.08x = 168,030 × 68,047.92
  4. Step 4: Simplify right side
    121,762.08x = 11,434,091,997.60
  5. Step 5: Solve for x
    x = 11,434,091,997.60/121,762.08
  6. Step 6: Final answer
    x = 93,905.20

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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.