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Finding the Fourth Proportional to 131,781.72, 181,884.60 and 103,044.60

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Solution

The fourth proportional to 131,781.72, 181,884.60 and 103,044.60 is: 142,221.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,781.72 : 181,884.60 = 103,044.60 : x
  2. Step 2: Convert to fraction form
    131,781.72/181,884.60 = 103,044.60/x
  3. Step 3: Cross multiply
    131,781.72x = 181,884.60 × 103,044.60
  4. Step 4: Simplify right side
    131,781.72x = 18,742,225,853.16
  5. Step 5: Solve for x
    x = 18,742,225,853.16/131,781.72
  6. Step 6: Final answer
    x = 142,221.74

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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.