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Finding the Fourth Proportional to 78,693.81, 108,597.56 and 42,883.85

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Solution

The fourth proportional to 78,693.81, 108,597.56 and 42,883.85 is: 59,179.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,693.81 : 108,597.56 = 42,883.85 : x
  2. Step 2: Convert to fraction form
    78,693.81/108,597.56 = 42,883.85/x
  3. Step 3: Cross multiply
    78,693.81x = 108,597.56 × 42,883.85
  4. Step 4: Simplify right side
    78,693.81x = 4,657,080,716.00
  5. Step 5: Solve for x
    x = 4,657,080,716.00/78,693.81
  6. Step 6: Final answer
    x = 59,179.76

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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.