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Finding the Fourth Proportional to 186,678.95, 280,111.82 and 85,476.78

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Solution

The fourth proportional to 186,678.95, 280,111.82 and 85,476.78 is: 128,257.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,678.95 : 280,111.82 = 85,476.78 : x
  2. Step 2: Convert to fraction form
    186,678.95/280,111.82 = 85,476.78/x
  3. Step 3: Cross multiply
    186,678.95x = 280,111.82 × 85,476.78
  4. Step 4: Simplify right side
    186,678.95x = 23,943,055,986.16
  5. Step 5: Solve for x
    x = 23,943,055,986.16/186,678.95
  6. Step 6: Final answer
    x = 128,257.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.