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Finding the Fourth Proportional to 66,507.34, 91,705.71 and 54,369.94

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Solution

The fourth proportional to 66,507.34, 91,705.71 and 54,369.94 is: 74,969.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,507.34 : 91,705.71 = 54,369.94 : x
  2. Step 2: Convert to fraction form
    66,507.34/91,705.71 = 54,369.94/x
  3. Step 3: Cross multiply
    66,507.34x = 91,705.71 × 54,369.94
  4. Step 4: Simplify right side
    66,507.34x = 4,986,033,950.36
  5. Step 5: Solve for x
    x = 4,986,033,950.36/66,507.34
  6. Step 6: Final answer
    x = 74,969.68

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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.