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Finding the Fourth Proportional to 66,637.47, 91,900.14 and 55,288.97

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Solution

The fourth proportional to 66,637.47, 91,900.14 and 55,288.97 is: 76,249.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,637.47 : 91,900.14 = 55,288.97 : x
  2. Step 2: Convert to fraction form
    66,637.47/91,900.14 = 55,288.97/x
  3. Step 3: Cross multiply
    66,637.47x = 91,900.14 × 55,288.97
  4. Step 4: Simplify right side
    66,637.47x = 5,081,063,623.96
  5. Step 5: Solve for x
    x = 5,081,063,623.96/66,637.47
  6. Step 6: Final answer
    x = 76,249.35

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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.