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Finding the Fourth Proportional to 85,695.92, 128,556.12 and 26,536.88

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Solution

The fourth proportional to 85,695.92, 128,556.12 and 26,536.88 is: 39,809.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,695.92 : 128,556.12 = 26,536.88 : x
  2. Step 2: Convert to fraction form
    85,695.92/128,556.12 = 26,536.88/x
  3. Step 3: Cross multiply
    85,695.92x = 128,556.12 × 26,536.88
  4. Step 4: Simplify right side
    85,695.92x = 3,411,478,329.71
  5. Step 5: Solve for x
    x = 3,411,478,329.71/85,695.92
  6. Step 6: Final answer
    x = 39,809.11

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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.