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Finding the Fourth Proportional to 181,720.80, 272,840.40 and 137,656.80

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Solution

The fourth proportional to 181,720.80, 272,840.40 and 137,656.80 is: 206,681.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,720.80 : 272,840.40 = 137,656.80 : x
  2. Step 2: Convert to fraction form
    181,720.80/272,840.40 = 137,656.80/x
  3. Step 3: Cross multiply
    181,720.80x = 272,840.40 × 137,656.80
  4. Step 4: Simplify right side
    181,720.80x = 37,558,336,374.72
  5. Step 5: Solve for x
    x = 37,558,336,374.72/181,720.80
  6. Step 6: Final answer
    x = 206,681.55

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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.