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Finding the Fourth Proportional to 66,347.40, 91,385.10 and 51,004.68

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Solution

The fourth proportional to 66,347.40, 91,385.10 and 51,004.68 is: 70,252.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,347.40 : 91,385.10 = 51,004.68 : x
  2. Step 2: Convert to fraction form
    66,347.40/91,385.10 = 51,004.68/x
  3. Step 3: Cross multiply
    66,347.40x = 91,385.10 × 51,004.68
  4. Step 4: Simplify right side
    66,347.40x = 4,661,067,782.27
  5. Step 5: Solve for x
    x = 4,661,067,782.27/66,347.40
  6. Step 6: Final answer
    x = 70,252.46

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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.