Home / 85,727.10-128,590.65-54,234.30

Finding the Fourth Proportional to 85,727.10, 128,590.65 and 54,234.30

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Solution

The fourth proportional to 85,727.10, 128,590.65 and 54,234.30 is: 81,351.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,727.10 : 128,590.65 = 54,234.30 : x
  2. Step 2: Convert to fraction form
    85,727.10/128,590.65 = 54,234.30/x
  3. Step 3: Cross multiply
    85,727.10x = 128,590.65 × 54,234.30
  4. Step 4: Simplify right side
    85,727.10x = 6,974,023,889.30
  5. Step 5: Solve for x
    x = 6,974,023,889.30/85,727.10
  6. Step 6: Final answer
    x = 81,351.45

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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.