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Finding the Fourth Proportional to 74,422.69, 102,702.90 and 40,430.91

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Solution

The fourth proportional to 74,422.69, 102,702.90 and 40,430.91 is: 55,794.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,422.69 : 102,702.90 = 40,430.91 : x
  2. Step 2: Convert to fraction form
    74,422.69/102,702.90 = 40,430.91/x
  3. Step 3: Cross multiply
    74,422.69x = 102,702.90 × 40,430.91
  4. Step 4: Simplify right side
    74,422.69x = 4,152,371,706.64
  5. Step 5: Solve for x
    x = 4,152,371,706.64/74,422.69
  6. Step 6: Final answer
    x = 55,794.43

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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.