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Finding the Fourth Proportional to 74,475.90, 102,777.74 and 40,484.91

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Solution

The fourth proportional to 74,475.90, 102,777.74 and 40,484.91 is: 55,869.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,475.90 : 102,777.74 = 40,484.91 : x
  2. Step 2: Convert to fraction form
    74,475.90/102,777.74 = 40,484.91/x
  3. Step 3: Cross multiply
    74,475.90x = 102,777.74 × 40,484.91
  4. Step 4: Simplify right side
    74,475.90x = 4,160,947,351.48
  5. Step 5: Solve for x
    x = 4,160,947,351.48/74,475.90
  6. Step 6: Final answer
    x = 55,869.72

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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.