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Finding the Fourth Proportional to 74,390.56, 102,659.70 and 40,856.56

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Solution

The fourth proportional to 74,390.56, 102,659.70 and 40,856.56 is: 56,382.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,390.56 : 102,659.70 = 40,856.56 : x
  2. Step 2: Convert to fraction form
    74,390.56/102,659.70 = 40,856.56/x
  3. Step 3: Cross multiply
    74,390.56x = 102,659.70 × 40,856.56
  4. Step 4: Simplify right side
    74,390.56x = 4,194,322,192.63
  5. Step 5: Solve for x
    x = 4,194,322,192.63/74,390.56
  6. Step 6: Final answer
    x = 56,382.45

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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.