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Finding the Fourth Proportional to 186,987.40, 280,394.70 and 81,752.20

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Solution

The fourth proportional to 186,987.40, 280,394.70 and 81,752.20 is: 122,590.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,987.40 : 280,394.70 = 81,752.20 : x
  2. Step 2: Convert to fraction form
    186,987.40/280,394.70 = 81,752.20/x
  3. Step 3: Cross multiply
    186,987.40x = 280,394.70 × 81,752.20
  4. Step 4: Simplify right side
    186,987.40x = 22,922,883,593.34
  5. Step 5: Solve for x
    x = 22,922,883,593.34/186,987.40
  6. Step 6: Final answer
    x = 122,590.53

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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.