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Finding the Fourth Proportional to 74,520, 102,785.52 and 49,018.32

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Solution

The fourth proportional to 74,520, 102,785.52 and 49,018.32 is: 67,611.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,520 : 102,785.52 = 49,018.32 : x
  2. Step 2: Convert to fraction form
    74,520/102,785.52 = 49,018.32/x
  3. Step 3: Cross multiply
    74,520x = 102,785.52 × 49,018.32
  4. Step 4: Simplify right side
    74,520x = 5,038,373,510.73
  5. Step 5: Solve for x
    x = 5,038,373,510.73/74,520
  6. Step 6: Final answer
    x = 67,611.02

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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.