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Finding the Fourth Proportional to 103,443.80, 155,165.70 and 92,290.10

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Solution

The fourth proportional to 103,443.80, 155,165.70 and 92,290.10 is: 138,435.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,443.80 : 155,165.70 = 92,290.10 : x
  2. Step 2: Convert to fraction form
    103,443.80/155,165.70 = 92,290.10/x
  3. Step 3: Cross multiply
    103,443.80x = 155,165.70 × 92,290.10
  4. Step 4: Simplify right side
    103,443.80x = 14,320,257,969.57
  5. Step 5: Solve for x
    x = 14,320,257,969.57/103,443.80
  6. Step 6: Final answer
    x = 138,435.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.