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Finding the Fourth Proportional to 78,240.03, 107,963.31 and 48,026.64

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Solution

The fourth proportional to 78,240.03, 107,963.31 and 48,026.64 is: 66,271.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,240.03 : 107,963.31 = 48,026.64 : x
  2. Step 2: Convert to fraction form
    78,240.03/107,963.31 = 48,026.64/x
  3. Step 3: Cross multiply
    78,240.03x = 107,963.31 × 48,026.64
  4. Step 4: Simplify right side
    78,240.03x = 5,185,115,022.58
  5. Step 5: Solve for x
    x = 5,185,115,022.58/78,240.03
  6. Step 6: Final answer
    x = 66,271.89

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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.