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Finding the Fourth Proportional to 85,470.84, 128,220.84 and 26,305.20

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Solution

The fourth proportional to 85,470.84, 128,220.84 and 26,305.20 is: 39,462.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,470.84 : 128,220.84 = 26,305.20 : x
  2. Step 2: Convert to fraction form
    85,470.84/128,220.84 = 26,305.20/x
  3. Step 3: Cross multiply
    85,470.84x = 128,220.84 × 26,305.20
  4. Step 4: Simplify right side
    85,470.84x = 3,372,874,840.37
  5. Step 5: Solve for x
    x = 3,372,874,840.37/85,470.84
  6. Step 6: Final answer
    x = 39,462.29

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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.