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Finding the Fourth Proportional to 74,656.60, 102,989.81 and 47,777.56

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Solution

The fourth proportional to 74,656.60, 102,989.81 and 47,777.56 is: 65,909.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,656.60 : 102,989.81 = 47,777.56 : x
  2. Step 2: Convert to fraction form
    74,656.60/102,989.81 = 47,777.56/x
  3. Step 3: Cross multiply
    74,656.60x = 102,989.81 × 47,777.56
  4. Step 4: Simplify right side
    74,656.60x = 4,920,601,826.66
  5. Step 5: Solve for x
    x = 4,920,601,826.66/74,656.60
  6. Step 6: Final answer
    x = 65,909.80

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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.