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Finding the Fourth Proportional to 66,219, 99,262.89 and 31,095.78

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Solution

The fourth proportional to 66,219, 99,262.89 and 31,095.78 is: 46,612.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,219 : 99,262.89 = 31,095.78 : x
  2. Step 2: Convert to fraction form
    66,219/99,262.89 = 31,095.78/x
  3. Step 3: Cross multiply
    66,219x = 99,262.89 × 31,095.78
  4. Step 4: Simplify right side
    66,219x = 3,086,656,989.60
  5. Step 5: Solve for x
    x = 3,086,656,989.60/66,219
  6. Step 6: Final answer
    x = 46,612.86

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1.5x scale

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.