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Finding the Fourth Proportional to 85,386.81, 128,083.88 and 26,224.83

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Solution

The fourth proportional to 85,386.81, 128,083.88 and 26,224.83 is: 39,338.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,386.81 : 128,083.88 = 26,224.83 : x
  2. Step 2: Convert to fraction form
    85,386.81/128,083.88 = 26,224.83/x
  3. Step 3: Cross multiply
    85,386.81x = 128,083.88 × 26,224.83
  4. Step 4: Simplify right side
    85,386.81x = 3,358,977,847.62
  5. Step 5: Solve for x
    x = 3,358,977,847.62/85,386.81
  6. Step 6: Final answer
    x = 39,338.37

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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.