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Finding the Fourth Proportional to 74,321.46, 102,579.84 and 47,079.93

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Solution

The fourth proportional to 74,321.46, 102,579.84 and 47,079.93 is: 64,980.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,321.46 : 102,579.84 = 47,079.93 : x
  2. Step 2: Convert to fraction form
    74,321.46/102,579.84 = 47,079.93/x
  3. Step 3: Cross multiply
    74,321.46x = 102,579.84 × 47,079.93
  4. Step 4: Simplify right side
    74,321.46x = 4,829,451,686.61
  5. Step 5: Solve for x
    x = 4,829,451,686.61/74,321.46
  6. Step 6: Final answer
    x = 64,980.58

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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.