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Finding the Fourth Proportional to 64,998.32, 89,699.32 and 39,861.68

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Solution

The fourth proportional to 64,998.32, 89,699.32 and 39,861.68 is: 55,010.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,998.32 : 89,699.32 = 39,861.68 : x
  2. Step 2: Convert to fraction form
    64,998.32/89,699.32 = 39,861.68/x
  3. Step 3: Cross multiply
    64,998.32x = 89,699.32 × 39,861.68
  4. Step 4: Simplify right side
    64,998.32x = 3,575,565,590.06
  5. Step 5: Solve for x
    x = 3,575,565,590.06/64,998.32
  6. Step 6: Final answer
    x = 55,010.12

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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.