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Finding the Fourth Proportional to 85,967.33, 128,963.95 and 26,807.63

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Solution

The fourth proportional to 85,967.33, 128,963.95 and 26,807.63 is: 40,215.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967.33 : 128,963.95 = 26,807.63 : x
  2. Step 2: Convert to fraction form
    85,967.33/128,963.95 = 26,807.63/x
  3. Step 3: Cross multiply
    85,967.33x = 128,963.95 × 26,807.63
  4. Step 4: Simplify right side
    85,967.33x = 3,457,217,143.10
  5. Step 5: Solve for x
    x = 3,457,217,143.10/85,967.33
  6. Step 6: Final answer
    x = 40,215.48

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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.