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Finding the Fourth Proportional to 85,334.40, 128,001.60 and 57,340.80

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Solution

The fourth proportional to 85,334.40, 128,001.60 and 57,340.80 is: 86,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,334.40 : 128,001.60 = 57,340.80 : x
  2. Step 2: Convert to fraction form
    85,334.40/128,001.60 = 57,340.80/x
  3. Step 3: Cross multiply
    85,334.40x = 128,001.60 × 57,340.80
  4. Step 4: Simplify right side
    85,334.40x = 7,339,714,145.28
  5. Step 5: Solve for x
    x = 7,339,714,145.28/85,334.40
  6. Step 6: Final answer
    x = 86,011.20

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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.