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Finding the Fourth Proportional to 74,422.39, 102,702.49 and 40,430.60

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Solution

The fourth proportional to 74,422.39, 102,702.49 and 40,430.60 is: 55,794.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,422.39 : 102,702.49 = 40,430.60 : x
  2. Step 2: Convert to fraction form
    74,422.39/102,702.49 = 40,430.60/x
  3. Step 3: Cross multiply
    74,422.39x = 102,702.49 × 40,430.60
  4. Step 4: Simplify right side
    74,422.39x = 4,152,323,447.87
  5. Step 5: Solve for x
    x = 4,152,323,447.87/74,422.39
  6. Step 6: Final answer
    x = 55,794.01

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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.