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Finding the Fourth Proportional to 64,986.76, 89,681.75 and 35,178.76

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Solution

The fourth proportional to 64,986.76, 89,681.75 and 35,178.76 is: 48,546.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,986.76 : 89,681.75 = 35,178.76 : x
  2. Step 2: Convert to fraction form
    64,986.76/89,681.75 = 35,178.76/x
  3. Step 3: Cross multiply
    64,986.76x = 89,681.75 × 35,178.76
  4. Step 4: Simplify right side
    64,986.76x = 3,154,892,759.63
  5. Step 5: Solve for x
    x = 3,154,892,759.63/64,986.76
  6. Step 6: Final answer
    x = 48,546.70

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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.