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Finding the Fourth Proportional to 121,866.40, 168,174.48 and 68,150.80

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Solution

The fourth proportional to 121,866.40, 168,174.48 and 68,150.80 is: 94,047.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,866.40 : 168,174.48 = 68,150.80 : x
  2. Step 2: Convert to fraction form
    121,866.40/168,174.48 = 68,150.80/x
  3. Step 3: Cross multiply
    121,866.40x = 168,174.48 × 68,150.80
  4. Step 4: Simplify right side
    121,866.40x = 11,461,225,351.58
  5. Step 5: Solve for x
    x = 11,461,225,351.58/121,866.40
  6. Step 6: Final answer
    x = 94,047.46

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1.5x scale

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.