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Finding the Fourth Proportional to 85,313.90, 127,786.16 and 55,641.72

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Solution

The fourth proportional to 85,313.90, 127,786.16 and 55,641.72 is: 83,342.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,313.90 : 127,786.16 = 55,641.72 : x
  2. Step 2: Convert to fraction form
    85,313.90/127,786.16 = 55,641.72/x
  3. Step 3: Cross multiply
    85,313.90x = 127,786.16 × 55,641.72
  4. Step 4: Simplify right side
    85,313.90x = 7,110,241,734.60
  5. Step 5: Solve for x
    x = 7,110,241,734.60/85,313.90
  6. Step 6: Final answer
    x = 83,342.13

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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.