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Finding the Fourth Proportional to 121,010.60, 181,710.30 and 91,461.80

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Solution

The fourth proportional to 121,010.60, 181,710.30 and 91,461.80 is: 137,339.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,010.60 : 181,710.30 = 91,461.80 : x
  2. Step 2: Convert to fraction form
    121,010.60/181,710.30 = 91,461.80/x
  3. Step 3: Cross multiply
    121,010.60x = 181,710.30 × 91,461.80
  4. Step 4: Simplify right side
    121,010.60x = 16,619,551,116.54
  5. Step 5: Solve for x
    x = 16,619,551,116.54/121,010.60
  6. Step 6: Final answer
    x = 137,339.63

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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.