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Finding the Fourth Proportional to 65,178.32, 89,953.63 and 39,699.63

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Solution

The fourth proportional to 65,178.32, 89,953.63 and 39,699.63 is: 54,790.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,178.32 : 89,953.63 = 39,699.63 : x
  2. Step 2: Convert to fraction form
    65,178.32/89,953.63 = 39,699.63/x
  3. Step 3: Cross multiply
    65,178.32x = 89,953.63 × 39,699.63
  4. Step 4: Simplify right side
    65,178.32x = 3,571,125,728.91
  5. Step 5: Solve for x
    x = 3,571,125,728.91/65,178.32
  6. Step 6: Final answer
    x = 54,790.09

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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.