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Finding the Fourth Proportional to 108,986.72, 150,398.32 and 61,238.88

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Solution

The fourth proportional to 108,986.72, 150,398.32 and 61,238.88 is: 84,507.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,986.72 : 150,398.32 = 61,238.88 : x
  2. Step 2: Convert to fraction form
    108,986.72/150,398.32 = 61,238.88/x
  3. Step 3: Cross multiply
    108,986.72x = 150,398.32 × 61,238.88
  4. Step 4: Simplify right side
    108,986.72x = 9,210,224,670.68
  5. Step 5: Solve for x
    x = 9,210,224,670.68/108,986.72
  6. Step 6: Final answer
    x = 84,507.77

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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.