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Finding the Fourth Proportional to 89,507.86, 134,261.80 and 42,618.58

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Solution

The fourth proportional to 89,507.86, 134,261.80 and 42,618.58 is: 63,927.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,507.86 : 134,261.80 = 42,618.58 : x
  2. Step 2: Convert to fraction form
    89,507.86/134,261.80 = 42,618.58/x
  3. Step 3: Cross multiply
    89,507.86x = 134,261.80 × 42,618.58
  4. Step 4: Simplify right side
    89,507.86x = 5,722,046,822.04
  5. Step 5: Solve for x
    x = 5,722,046,822.04/89,507.86
  6. Step 6: Final answer
    x = 63,927.87

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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.