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Finding the Fourth Proportional to 108,670.64, 149,986.44 and 70,879.28

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Solution

The fourth proportional to 108,670.64, 149,986.44 and 70,879.28 is: 97,827.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,670.64 : 149,986.44 = 70,879.28 : x
  2. Step 2: Convert to fraction form
    108,670.64/149,986.44 = 70,879.28/x
  3. Step 3: Cross multiply
    108,670.64x = 149,986.44 × 70,879.28
  4. Step 4: Simplify right side
    108,670.64x = 10,630,930,876.96
  5. Step 5: Solve for x
    x = 10,630,930,876.96/108,670.64
  6. Step 6: Final answer
    x = 97,827.08

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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.