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Finding the Fourth Proportional to 100,558.28, 150,837.56 and 42,840.65

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Solution

The fourth proportional to 100,558.28, 150,837.56 and 42,840.65 is: 64,261.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,558.28 : 150,837.56 = 42,840.65 : x
  2. Step 2: Convert to fraction form
    100,558.28/150,837.56 = 42,840.65/x
  3. Step 3: Cross multiply
    100,558.28x = 150,837.56 × 42,840.65
  4. Step 4: Simplify right side
    100,558.28x = 6,461,979,114.81
  5. Step 5: Solve for x
    x = 6,461,979,114.81/100,558.28
  6. Step 6: Final answer
    x = 64,261.03

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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.