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Finding the Fourth Proportional to 85,571.10, 128,368.80 and 26,400.60

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Solution

The fourth proportional to 85,571.10, 128,368.80 and 26,400.60 is: 39,604.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,571.10 : 128,368.80 = 26,400.60 : x
  2. Step 2: Convert to fraction form
    85,571.10/128,368.80 = 26,400.60/x
  3. Step 3: Cross multiply
    85,571.10x = 128,368.80 × 26,400.60
  4. Step 4: Simplify right side
    85,571.10x = 3,389,013,341.28
  5. Step 5: Solve for x
    x = 3,389,013,341.28/85,571.10
  6. Step 6: Final answer
    x = 39,604.65

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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.