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Finding the Fourth Proportional to 153,591.96, 211,969.50 and 86,530.20

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Solution

The fourth proportional to 153,591.96, 211,969.50 and 86,530.20 is: 119,418.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,591.96 : 211,969.50 = 86,530.20 : x
  2. Step 2: Convert to fraction form
    153,591.96/211,969.50 = 86,530.20/x
  3. Step 3: Cross multiply
    153,591.96x = 211,969.50 × 86,530.20
  4. Step 4: Simplify right side
    153,591.96x = 18,341,763,228.90
  5. Step 5: Solve for x
    x = 18,341,763,228.90/153,591.96
  6. Step 6: Final answer
    x = 119,418.77

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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.