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Finding the Fourth Proportional to 78,698.53, 108,600.80 and 42,887.76

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Solution

The fourth proportional to 78,698.53, 108,600.80 and 42,887.76 is: 59,183.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,698.53 : 108,600.80 = 42,887.76 : x
  2. Step 2: Convert to fraction form
    78,698.53/108,600.80 = 42,887.76/x
  3. Step 3: Cross multiply
    78,698.53x = 108,600.80 × 42,887.76
  4. Step 4: Simplify right side
    78,698.53x = 4,657,645,046.21
  5. Step 5: Solve for x
    x = 4,657,645,046.21/78,698.53
  6. Step 6: Final answer
    x = 59,183.38

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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.