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Finding the Fourth Proportional to 361,841.36, 542,746.34 and 121,939.40

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Solution

The fourth proportional to 361,841.36, 542,746.34 and 121,939.40 is: 182,903.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,841.36 : 542,746.34 = 121,939.40 : x
  2. Step 2: Convert to fraction form
    361,841.36/542,746.34 = 121,939.40/x
  3. Step 3: Cross multiply
    361,841.36x = 542,746.34 × 121,939.40
  4. Step 4: Simplify right side
    361,841.36x = 66,182,163,051.80
  5. Step 5: Solve for x
    x = 66,182,163,051.80/361,841.36
  6. Step 6: Final answer
    x = 182,903.81

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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.