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Finding the Fourth Proportional to 171,729, 236,905.38 and 121,455.72

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Solution

The fourth proportional to 171,729, 236,905.38 and 121,455.72 is: 167,551.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,729 : 236,905.38 = 121,455.72 : x
  2. Step 2: Convert to fraction form
    171,729/236,905.38 = 121,455.72/x
  3. Step 3: Cross multiply
    171,729x = 236,905.38 × 121,455.72
  4. Step 4: Simplify right side
    171,729x = 28,773,513,499.77
  5. Step 5: Solve for x
    x = 28,773,513,499.77/171,729
  6. Step 6: Final answer
    x = 167,551.86

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1.5x scale

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.