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Finding the Fourth Proportional to 85,480.60, 128,238.72 and 26,313.34

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Solution

The fourth proportional to 85,480.60, 128,238.72 and 26,313.34 is: 39,475.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,480.60 : 128,238.72 = 26,313.34 : x
  2. Step 2: Convert to fraction form
    85,480.60/128,238.72 = 26,313.34/x
  3. Step 3: Cross multiply
    85,480.60x = 128,238.72 × 26,313.34
  4. Step 4: Simplify right side
    85,480.60x = 3,374,389,040.52
  5. Step 5: Solve for x
    x = 3,374,389,040.52/85,480.60
  6. Step 6: Final answer
    x = 39,475.50

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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.