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Finding the Fourth Proportional to 78,241.72, 107,970.66 and 46,391.56

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Solution

The fourth proportional to 78,241.72, 107,970.66 and 46,391.56 is: 64,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,241.72 : 107,970.66 = 46,391.56 : x
  2. Step 2: Convert to fraction form
    78,241.72/107,970.66 = 46,391.56/x
  3. Step 3: Cross multiply
    78,241.72x = 107,970.66 × 46,391.56
  4. Step 4: Simplify right side
    78,241.72x = 5,008,927,351.63
  5. Step 5: Solve for x
    x = 5,008,927,351.63/78,241.72
  6. Step 6: Final answer
    x = 64,018.63

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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.