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Finding the Fourth Proportional to 78,235.35, 107,964.74 and 42,425.25

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Solution

The fourth proportional to 78,235.35, 107,964.74 and 42,425.25 is: 58,546.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,235.35 : 107,964.74 = 42,425.25 : x
  2. Step 2: Convert to fraction form
    78,235.35/107,964.74 = 42,425.25/x
  3. Step 3: Cross multiply
    78,235.35x = 107,964.74 × 42,425.25
  4. Step 4: Simplify right side
    78,235.35x = 4,580,430,873.56
  5. Step 5: Solve for x
    x = 4,580,430,873.56/78,235.35
  6. Step 6: Final answer
    x = 58,546.82

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1.5x scale

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.