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Finding the Fourth Proportional to 85,218.60, 117,579.90 and 54,162.54

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Solution

The fourth proportional to 85,218.60, 117,579.90 and 54,162.54 is: 74,730.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,218.60 : 117,579.90 = 54,162.54 : x
  2. Step 2: Convert to fraction form
    85,218.60/117,579.90 = 54,162.54/x
  3. Step 3: Cross multiply
    85,218.60x = 117,579.90 × 54,162.54
  4. Step 4: Simplify right side
    85,218.60x = 6,368,426,036.95
  5. Step 5: Solve for x
    x = 6,368,426,036.95/85,218.60
  6. Step 6: Final answer
    x = 74,730.47

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1.5x scale

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.