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Finding the Fourth Proportional to 186,908.35, 257,931.78 and 115,259.71

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Solution

The fourth proportional to 186,908.35, 257,931.78 and 115,259.71 is: 159,057.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,908.35 : 257,931.78 = 115,259.71 : x
  2. Step 2: Convert to fraction form
    186,908.35/257,931.78 = 115,259.71/x
  3. Step 3: Cross multiply
    186,908.35x = 257,931.78 × 115,259.71
  4. Step 4: Simplify right side
    186,908.35x = 29,729,142,162.58
  5. Step 5: Solve for x
    x = 29,729,142,162.58/186,908.35
  6. Step 6: Final answer
    x = 159,057.32

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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.