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Finding the Fourth Proportional to 86,219.64, 118,957.41 and 54,398.79

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Solution

The fourth proportional to 86,219.64, 118,957.41 and 54,398.79 is: 75,054.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,219.64 : 118,957.41 = 54,398.79 : x
  2. Step 2: Convert to fraction form
    86,219.64/118,957.41 = 54,398.79/x
  3. Step 3: Cross multiply
    86,219.64x = 118,957.41 × 54,398.79
  4. Step 4: Simplify right side
    86,219.64x = 6,471,139,165.53
  5. Step 5: Solve for x
    x = 6,471,139,165.53/86,219.64
  6. Step 6: Final answer
    x = 75,054.12

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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.