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Finding the Fourth Proportional to 123,795.73, 170,838.81 and 72,810.60

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Solution

The fourth proportional to 123,795.73, 170,838.81 and 72,810.60 is: 100,479.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,795.73 : 170,838.81 = 72,810.60 : x
  2. Step 2: Convert to fraction form
    123,795.73/170,838.81 = 72,810.60/x
  3. Step 3: Cross multiply
    123,795.73x = 170,838.81 × 72,810.60
  4. Step 4: Simplify right side
    123,795.73x = 12,438,875,895.33
  5. Step 5: Solve for x
    x = 12,438,875,895.33/123,795.73
  6. Step 6: Final answer
    x = 100,479.04

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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.