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Finding the Fourth Proportional to 78,690.96, 108,593.58 and 42,880.98

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Solution

The fourth proportional to 78,690.96, 108,593.58 and 42,880.98 is: 59,175.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.96 : 108,593.58 = 42,880.98 : x
  2. Step 2: Convert to fraction form
    78,690.96/108,593.58 = 42,880.98/x
  3. Step 3: Cross multiply
    78,690.96x = 108,593.58 × 42,880.98
  4. Step 4: Simplify right side
    78,690.96x = 4,656,599,132.11
  5. Step 5: Solve for x
    x = 4,656,599,132.11/78,690.96
  6. Step 6: Final answer
    x = 59,175.78

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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.