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Finding the Fourth Proportional to 66,564.80, 91,871.29 and 39,339.76

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Solution

The fourth proportional to 66,564.80, 91,871.29 and 39,339.76 is: 54,295.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,564.80 : 91,871.29 = 39,339.76 : x
  2. Step 2: Convert to fraction form
    66,564.80/91,871.29 = 39,339.76/x
  3. Step 3: Cross multiply
    66,564.80x = 91,871.29 × 39,339.76
  4. Step 4: Simplify right side
    66,564.80x = 3,614,194,302.79
  5. Step 5: Solve for x
    x = 3,614,194,302.79/66,564.80
  6. Step 6: Final answer
    x = 54,295.88

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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.