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Finding the Fourth Proportional to 123,740.51, 170,762.01 and 67,151.88

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Solution

The fourth proportional to 123,740.51, 170,762.01 and 67,151.88 is: 92,669.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,740.51 : 170,762.01 = 67,151.88 : x
  2. Step 2: Convert to fraction form
    123,740.51/170,762.01 = 67,151.88/x
  3. Step 3: Cross multiply
    123,740.51x = 170,762.01 × 67,151.88
  4. Step 4: Simplify right side
    123,740.51x = 11,466,990,004.08
  5. Step 5: Solve for x
    x = 11,466,990,004.08/123,740.51
  6. Step 6: Final answer
    x = 92,669.66

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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.