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Finding the Fourth Proportional to 85,311.66, 117,666.63 and 62,643.54

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Solution

The fourth proportional to 85,311.66, 117,666.63 and 62,643.54 is: 86,401.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311.66 : 117,666.63 = 62,643.54 : x
  2. Step 2: Convert to fraction form
    85,311.66/117,666.63 = 62,643.54/x
  3. Step 3: Cross multiply
    85,311.66x = 117,666.63 × 62,643.54
  4. Step 4: Simplify right side
    85,311.66x = 7,371,054,243.07
  5. Step 5: Solve for x
    x = 7,371,054,243.07/85,311.66
  6. Step 6: Final answer
    x = 86,401.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.