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Finding the Fourth Proportional to 99,750.78, 137,656.02 and 63,940.77

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Solution

The fourth proportional to 99,750.78, 137,656.02 and 63,940.77 is: 88,238.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,750.78 : 137,656.02 = 63,940.77 : x
  2. Step 2: Convert to fraction form
    99,750.78/137,656.02 = 63,940.77/x
  3. Step 3: Cross multiply
    99,750.78x = 137,656.02 × 63,940.77
  4. Step 4: Simplify right side
    99,750.78x = 8,801,831,913.94
  5. Step 5: Solve for x
    x = 8,801,831,913.94/99,750.78
  6. Step 6: Final answer
    x = 88,238.23

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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.