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Finding the Fourth Proportional to 117,578.89, 162,256.65 and 66,590.87

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Solution

The fourth proportional to 117,578.89, 162,256.65 and 66,590.87 is: 91,894.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,578.89 : 162,256.65 = 66,590.87 : x
  2. Step 2: Convert to fraction form
    117,578.89/162,256.65 = 66,590.87/x
  3. Step 3: Cross multiply
    117,578.89x = 162,256.65 × 66,590.87
  4. Step 4: Simplify right side
    117,578.89x = 10,804,811,486.79
  5. Step 5: Solve for x
    x = 10,804,811,486.79/117,578.89
  6. Step 6: Final answer
    x = 91,894.15

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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.