Home / 81,388.48-122,128.08-43,947.76

Finding the Fourth Proportional to 81,388.48, 122,128.08 and 43,947.76

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Solution

The fourth proportional to 81,388.48, 122,128.08 and 43,947.76 is: 65,946.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,388.48 : 122,128.08 = 43,947.76 : x
  2. Step 2: Convert to fraction form
    81,388.48/122,128.08 = 43,947.76/x
  3. Step 3: Cross multiply
    81,388.48x = 122,128.08 × 43,947.76
  4. Step 4: Simplify right side
    81,388.48x = 5,367,255,549.10
  5. Step 5: Solve for x
    x = 5,367,255,549.10/81,388.48
  6. Step 6: Final answer
    x = 65,946.13

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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.