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Finding the Fourth Proportional to 74,378.25, 102,641.99 and 40,844.25

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Solution

The fourth proportional to 74,378.25, 102,641.99 and 40,844.25 is: 56,365.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,378.25 : 102,641.99 = 40,844.25 : x
  2. Step 2: Convert to fraction form
    74,378.25/102,641.99 = 40,844.25/x
  3. Step 3: Cross multiply
    74,378.25x = 102,641.99 × 40,844.25
  4. Step 4: Simplify right side
    74,378.25x = 4,192,334,895.84
  5. Step 5: Solve for x
    x = 4,192,334,895.84/74,378.25
  6. Step 6: Final answer
    x = 56,365.07

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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.