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Finding the Fourth Proportional to 101,685.73, 140,278.85 and 63,980.77

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Solution

The fourth proportional to 101,685.73, 140,278.85 and 63,980.77 is: 88,263.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,685.73 : 140,278.85 = 63,980.77 : x
  2. Step 2: Convert to fraction form
    101,685.73/140,278.85 = 63,980.77/x
  3. Step 3: Cross multiply
    101,685.73x = 140,278.85 × 63,980.77
  4. Step 4: Simplify right side
    101,685.73x = 8,975,148,517.81
  5. Step 5: Solve for x
    x = 8,975,148,517.81/101,685.73
  6. Step 6: Final answer
    x = 88,263.60

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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.