Home / 85,109.40-127,664.10-57,115.80

Finding the Fourth Proportional to 85,109.40, 127,664.10 and 57,115.80

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Solution

The fourth proportional to 85,109.40, 127,664.10 and 57,115.80 is: 85,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,109.40 : 127,664.10 = 57,115.80 : x
  2. Step 2: Convert to fraction form
    85,109.40/127,664.10 = 57,115.80/x
  3. Step 3: Cross multiply
    85,109.40x = 127,664.10 × 57,115.80
  4. Step 4: Simplify right side
    85,109.40x = 7,291,637,202.78
  5. Step 5: Solve for x
    x = 7,291,637,202.78/85,109.40
  6. Step 6: Final answer
    x = 85,673.70

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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.