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Finding the Fourth Proportional to 175,376.80, 262,762.80 and 81,690.40

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Solution

The fourth proportional to 175,376.80, 262,762.80 and 81,690.40 is: 122,394.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,376.80 : 262,762.80 = 81,690.40 : x
  2. Step 2: Convert to fraction form
    175,376.80/262,762.80 = 81,690.40/x
  3. Step 3: Cross multiply
    175,376.80x = 262,762.80 × 81,690.40
  4. Step 4: Simplify right side
    175,376.80x = 21,465,198,237.12
  5. Step 5: Solve for x
    x = 21,465,198,237.12/175,376.80
  6. Step 6: Final answer
    x = 122,394.74

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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.