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Finding the Fourth Proportional to 186,139.74, 256,814.88 and 105,560.94

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Solution

The fourth proportional to 186,139.74, 256,814.88 and 105,560.94 is: 145,641.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,139.74 : 256,814.88 = 105,560.94 : x
  2. Step 2: Convert to fraction form
    186,139.74/256,814.88 = 105,560.94/x
  3. Step 3: Cross multiply
    186,139.74x = 256,814.88 × 105,560.94
  4. Step 4: Simplify right side
    186,139.74x = 27,109,620,138.79
  5. Step 5: Solve for x
    x = 27,109,620,138.79/186,139.74
  6. Step 6: Final answer
    x = 145,641.23

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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.