Home / 123,390.15-170,278.47-66,801.54

Finding the Fourth Proportional to 123,390.15, 170,278.47 and 66,801.54

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Solution

The fourth proportional to 123,390.15, 170,278.47 and 66,801.54 is: 92,186.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,390.15 : 170,278.47 = 66,801.54 : x
  2. Step 2: Convert to fraction form
    123,390.15/170,278.47 = 66,801.54/x
  3. Step 3: Cross multiply
    123,390.15x = 170,278.47 × 66,801.54
  4. Step 4: Simplify right side
    123,390.15x = 11,374,864,024.84
  5. Step 5: Solve for x
    x = 11,374,864,024.84/123,390.15
  6. Step 6: Final answer
    x = 92,186.16

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1.5x scale

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.