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Finding the Fourth Proportional to 74,911.59, 103,378.35 and 40,920.55

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Solution

The fourth proportional to 74,911.59, 103,378.35 and 40,920.55 is: 56,470.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,911.59 : 103,378.35 = 40,920.55 : x
  2. Step 2: Convert to fraction form
    74,911.59/103,378.35 = 40,920.55/x
  3. Step 3: Cross multiply
    74,911.59x = 103,378.35 × 40,920.55
  4. Step 4: Simplify right side
    74,911.59x = 4,230,298,940.09
  5. Step 5: Solve for x
    x = 4,230,298,940.09/74,911.59
  6. Step 6: Final answer
    x = 56,470.55

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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.