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Finding the Fourth Proportional to 74,375.72, 102,009.21 and 65,977.64

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Solution

The fourth proportional to 74,375.72, 102,009.21 and 65,977.64 is: 90,490.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,375.72 : 102,009.21 = 65,977.64 : x
  2. Step 2: Convert to fraction form
    74,375.72/102,009.21 = 65,977.64/x
  3. Step 3: Cross multiply
    74,375.72x = 102,009.21 × 65,977.64
  4. Step 4: Simplify right side
    74,375.72x = 6,730,326,934.06
  5. Step 5: Solve for x
    x = 6,730,326,934.06/74,375.72
  6. Step 6: Final answer
    x = 90,490.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.