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Finding the Fourth Proportional to 78,967.85, 108,975.38 and 43,157.85

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Solution

The fourth proportional to 78,967.85, 108,975.38 and 43,157.85 is: 59,557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,967.85 : 108,975.38 = 43,157.85 : x
  2. Step 2: Convert to fraction form
    78,967.85/108,975.38 = 43,157.85/x
  3. Step 3: Cross multiply
    78,967.85x = 108,975.38 × 43,157.85
  4. Step 4: Simplify right side
    78,967.85x = 4,703,142,887.94
  5. Step 5: Solve for x
    x = 4,703,142,887.94/78,967.85
  6. Step 6: Final answer
    x = 59,557.70

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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.