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Finding the Fourth Proportional to 85,655.36, 128,483.03 and 26,491.54

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Solution

The fourth proportional to 85,655.36, 128,483.03 and 26,491.54 is: 39,737.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,655.36 : 128,483.03 = 26,491.54 : x
  2. Step 2: Convert to fraction form
    85,655.36/128,483.03 = 26,491.54/x
  3. Step 3: Cross multiply
    85,655.36x = 128,483.03 × 26,491.54
  4. Step 4: Simplify right side
    85,655.36x = 3,403,713,328.57
  5. Step 5: Solve for x
    x = 3,403,713,328.57/85,655.36
  6. Step 6: Final answer
    x = 39,737.31

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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.