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Finding the Fourth Proportional to 101,685.86, 140,279.02 and 63,980.90

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Solution

The fourth proportional to 101,685.86, 140,279.02 and 63,980.90 is: 88,263.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,685.86 : 140,279.02 = 63,980.90 : x
  2. Step 2: Convert to fraction form
    101,685.86/140,279.02 = 63,980.90/x
  3. Step 3: Cross multiply
    101,685.86x = 140,279.02 × 63,980.90
  4. Step 4: Simplify right side
    101,685.86x = 8,975,177,089.37
  5. Step 5: Solve for x
    x = 8,975,177,089.37/101,685.86
  6. Step 6: Final answer
    x = 88,263.77

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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.