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Finding the Fourth Proportional to 121,866.50, 168,174.35 and 68,151.01

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Solution

The fourth proportional to 121,866.50, 168,174.35 and 68,151.01 is: 94,047.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,866.50 : 168,174.35 = 68,151.01 : x
  2. Step 2: Convert to fraction form
    121,866.50/168,174.35 = 68,151.01/x
  3. Step 3: Cross multiply
    121,866.50x = 168,174.35 × 68,151.01
  4. Step 4: Simplify right side
    121,866.50x = 11,461,251,808.59
  5. Step 5: Solve for x
    x = 11,461,251,808.59/121,866.50
  6. Step 6: Final answer
    x = 94,047.60

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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.