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Finding the Fourth Proportional to 186,691.76, 280,106.80 and 86,905.52

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Solution

The fourth proportional to 186,691.76, 280,106.80 and 86,905.52 is: 130,390.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,691.76 : 280,106.80 = 86,905.52 : x
  2. Step 2: Convert to fraction form
    186,691.76/280,106.80 = 86,905.52/x
  3. Step 3: Cross multiply
    186,691.76x = 280,106.80 × 86,905.52
  4. Step 4: Simplify right side
    186,691.76x = 24,342,827,109.54
  5. Step 5: Solve for x
    x = 24,342,827,109.54/186,691.76
  6. Step 6: Final answer
    x = 130,390.47

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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.