Home / 85,918.42-128,971.90-68,262.55

Finding the Fourth Proportional to 85,918.42, 128,971.90 and 68,262.55

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Solution

The fourth proportional to 85,918.42, 128,971.90 and 68,262.55 is: 102,468.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,918.42 : 128,971.90 = 68,262.55 : x
  2. Step 2: Convert to fraction form
    85,918.42/128,971.90 = 68,262.55/x
  3. Step 3: Cross multiply
    85,918.42x = 128,971.90 × 68,262.55
  4. Step 4: Simplify right side
    85,918.42x = 8,803,950,151.27
  5. Step 5: Solve for x
    x = 8,803,950,151.27/85,918.42
  6. Step 6: Final answer
    x = 102,468.71

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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.