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Finding the Fourth Proportional to 117,392.91, 161,992.35 and 66,403.01

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Solution

The fourth proportional to 117,392.91, 161,992.35 and 66,403.01 is: 91,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,392.91 : 161,992.35 = 66,403.01 : x
  2. Step 2: Convert to fraction form
    117,392.91/161,992.35 = 66,403.01/x
  3. Step 3: Cross multiply
    117,392.91x = 161,992.35 × 66,403.01
  4. Step 4: Simplify right side
    117,392.91x = 10,756,778,827.01
  5. Step 5: Solve for x
    x = 10,756,778,827.01/117,392.91
  6. Step 6: Final answer
    x = 91,630.57

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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.