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Finding the Fourth Proportional to 190,335.92, 285,505.90 and 77,987.30

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Solution

The fourth proportional to 190,335.92, 285,505.90 and 77,987.30 is: 116,981.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,335.92 : 285,505.90 = 77,987.30 : x
  2. Step 2: Convert to fraction form
    190,335.92/285,505.90 = 77,987.30/x
  3. Step 3: Cross multiply
    190,335.92x = 285,505.90 × 77,987.30
  4. Step 4: Simplify right side
    190,335.92x = 22,265,834,275.07
  5. Step 5: Solve for x
    x = 22,265,834,275.07/190,335.92
  6. Step 6: Final answer
    x = 116,981.78

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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.