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Finding the Fourth Proportional to 128,862.50, 177,829.63 and 72,273.87

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Solution

The fourth proportional to 128,862.50, 177,829.63 and 72,273.87 is: 99,737.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,862.50 : 177,829.63 = 72,273.87 : x
  2. Step 2: Convert to fraction form
    128,862.50/177,829.63 = 72,273.87/x
  3. Step 3: Cross multiply
    128,862.50x = 177,829.63 × 72,273.87
  4. Step 4: Simplify right side
    128,862.50x = 12,852,435,380.08
  5. Step 5: Solve for x
    x = 12,852,435,380.08/128,862.50
  6. Step 6: Final answer
    x = 99,737.60

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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.