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Finding the Fourth Proportional to 74,015.25, 102,143.48 and 40,481.25

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Solution

The fourth proportional to 74,015.25, 102,143.48 and 40,481.25 is: 55,865.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,015.25 : 102,143.48 = 40,481.25 : x
  2. Step 2: Convert to fraction form
    74,015.25/102,143.48 = 40,481.25/x
  3. Step 3: Cross multiply
    74,015.25x = 102,143.48 × 40,481.25
  4. Step 4: Simplify right side
    74,015.25x = 4,134,895,547.34
  5. Step 5: Solve for x
    x = 4,134,895,547.34/74,015.25
  6. Step 6: Final answer
    x = 55,865.45

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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.