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Finding the Fourth Proportional to 78,157.79, 107,843.55 and 43,703.15

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Solution

The fourth proportional to 78,157.79, 107,843.55 and 43,703.15 is: 60,302.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,157.79 : 107,843.55 = 43,703.15 : x
  2. Step 2: Convert to fraction form
    78,157.79/107,843.55 = 43,703.15/x
  3. Step 3: Cross multiply
    78,157.79x = 107,843.55 × 43,703.15
  4. Step 4: Simplify right side
    78,157.79x = 4,713,102,302.96
  5. Step 5: Solve for x
    x = 4,713,102,302.96/78,157.79
  6. Step 6: Final answer
    x = 60,302.40

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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.