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Finding the Fourth Proportional to 112,893.51, 155,724.60 and 74,652.87

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Solution

The fourth proportional to 112,893.51, 155,724.60 and 74,652.87 is: 102,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,893.51 : 155,724.60 = 74,652.87 : x
  2. Step 2: Convert to fraction form
    112,893.51/155,724.60 = 74,652.87/x
  3. Step 3: Cross multiply
    112,893.51x = 155,724.60 × 74,652.87
  4. Step 4: Simplify right side
    112,893.51x = 11,625,288,319.60
  5. Step 5: Solve for x
    x = 11,625,288,319.60/112,893.51
  6. Step 6: Final answer
    x = 102,975.70

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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.