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Finding the Fourth Proportional to 66,279.60, 91,465.80 and 36,064.86

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Solution

The fourth proportional to 66,279.60, 91,465.80 and 36,064.86 is: 49,769.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.60 : 91,465.80 = 36,064.86 : x
  2. Step 2: Convert to fraction form
    66,279.60/91,465.80 = 36,064.86/x
  3. Step 3: Cross multiply
    66,279.60x = 91,465.80 × 36,064.86
  4. Step 4: Simplify right side
    66,279.60x = 3,298,701,271.79
  5. Step 5: Solve for x
    x = 3,298,701,271.79/66,279.60
  6. Step 6: Final answer
    x = 49,769.48

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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.