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Finding the Fourth Proportional to 74,422.17, 102,702.19 and 40,430.39

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Solution

The fourth proportional to 74,422.17, 102,702.19 and 40,430.39 is: 55,793.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,422.17 : 102,702.19 = 40,430.39 : x
  2. Step 2: Convert to fraction form
    74,422.17/102,702.19 = 40,430.39/x
  3. Step 3: Cross multiply
    74,422.17x = 102,702.19 × 40,430.39
  4. Step 4: Simplify right side
    74,422.17x = 4,152,288,879.89
  5. Step 5: Solve for x
    x = 4,152,288,879.89/74,422.17
  6. Step 6: Final answer
    x = 55,793.71

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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.