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Finding the Fourth Proportional to 99,718.60, 137,614.74 and 57,285.64

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Solution

The fourth proportional to 99,718.60, 137,614.74 and 57,285.64 is: 79,055.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,718.60 : 137,614.74 = 57,285.64 : x
  2. Step 2: Convert to fraction form
    99,718.60/137,614.74 = 57,285.64/x
  3. Step 3: Cross multiply
    99,718.60x = 137,614.74 × 57,285.64
  4. Step 4: Simplify right side
    99,718.60x = 7,883,348,454.33
  5. Step 5: Solve for x
    x = 7,883,348,454.33/99,718.60
  6. Step 6: Final answer
    x = 79,055.95

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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.