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Finding the Fourth Proportional to 121,323.60, 181,985.40 and 38,206.80

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Solution

The fourth proportional to 121,323.60, 181,985.40 and 38,206.80 is: 57,310.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,323.60 : 181,985.40 = 38,206.80 : x
  2. Step 2: Convert to fraction form
    121,323.60/181,985.40 = 38,206.80/x
  3. Step 3: Cross multiply
    121,323.60x = 181,985.40 × 38,206.80
  4. Step 4: Simplify right side
    121,323.60x = 6,953,079,780.72
  5. Step 5: Solve for x
    x = 6,953,079,780.72/121,323.60
  6. Step 6: Final answer
    x = 57,310.20

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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.