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Finding the Fourth Proportional to 66,260, 91,472.64 and 51,118.64

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Solution

The fourth proportional to 66,260, 91,472.64 and 51,118.64 is: 70,569.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,260 : 91,472.64 = 51,118.64 : x
  2. Step 2: Convert to fraction form
    66,260/91,472.64 = 51,118.64/x
  3. Step 3: Cross multiply
    66,260x = 91,472.64 × 51,118.64
  4. Step 4: Simplify right side
    66,260x = 4,675,956,954.01
  5. Step 5: Solve for x
    x = 4,675,956,954.01/66,260
  6. Step 6: Final answer
    x = 70,569.83

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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.