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Finding the Fourth Proportional to 85,980.78, 128,997.06 and 26,822.70

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Solution

The fourth proportional to 85,980.78, 128,997.06 and 26,822.70 is: 40,242.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,980.78 : 128,997.06 = 26,822.70 : x
  2. Step 2: Convert to fraction form
    85,980.78/128,997.06 = 26,822.70/x
  3. Step 3: Cross multiply
    85,980.78x = 128,997.06 × 26,822.70
  4. Step 4: Simplify right side
    85,980.78x = 3,460,049,441.26
  5. Step 5: Solve for x
    x = 3,460,049,441.26/85,980.78
  6. Step 6: Final answer
    x = 40,242.13

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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.