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Finding the Fourth Proportional to 86,109.74, 118,889.42 and 77,006.86

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Solution

The fourth proportional to 86,109.74, 118,889.42 and 77,006.86 is: 106,321.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,109.74 : 118,889.42 = 77,006.86 : x
  2. Step 2: Convert to fraction form
    86,109.74/118,889.42 = 77,006.86/x
  3. Step 3: Cross multiply
    86,109.74x = 118,889.42 × 77,006.86
  4. Step 4: Simplify right side
    86,109.74x = 9,155,300,921.42
  5. Step 5: Solve for x
    x = 9,155,300,921.42/86,109.74
  6. Step 6: Final answer
    x = 106,321.32

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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.