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Finding the Fourth Proportional to 85,358.61, 117,772.00 and 55,132.90

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Solution

The fourth proportional to 85,358.61, 117,772.00 and 55,132.90 is: 76,068.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,358.61 : 117,772.00 = 55,132.90 : x
  2. Step 2: Convert to fraction form
    85,358.61/117,772.00 = 55,132.90/x
  3. Step 3: Cross multiply
    85,358.61x = 117,772.00 × 55,132.90
  4. Step 4: Simplify right side
    85,358.61x = 6,493,112,284.07
  5. Step 5: Solve for x
    x = 6,493,112,284.07/85,358.61
  6. Step 6: Final answer
    x = 76,068.63

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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.