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Finding the Fourth Proportional to 66,551.77, 91,840.21 and 37,870.79

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Solution

The fourth proportional to 66,551.77, 91,840.21 and 37,870.79 is: 52,260.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,551.77 : 91,840.21 = 37,870.79 : x
  2. Step 2: Convert to fraction form
    66,551.77/91,840.21 = 37,870.79/x
  3. Step 3: Cross multiply
    66,551.77x = 91,840.21 × 37,870.79
  4. Step 4: Simplify right side
    66,551.77x = 3,478,061,441.39
  5. Step 5: Solve for x
    x = 3,478,061,441.39/66,551.77
  6. Step 6: Final answer
    x = 52,260.99

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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.