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Finding the Fourth Proportional to 101,780.64, 140,439.06 and 61,467.30

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Solution

The fourth proportional to 101,780.64, 140,439.06 and 61,467.30 is: 84,813.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,780.64 : 140,439.06 = 61,467.30 : x
  2. Step 2: Convert to fraction form
    101,780.64/140,439.06 = 61,467.30/x
  3. Step 3: Cross multiply
    101,780.64x = 140,439.06 × 61,467.30
  4. Step 4: Simplify right side
    101,780.64x = 8,632,409,832.74
  5. Step 5: Solve for x
    x = 8,632,409,832.74/101,780.64
  6. Step 6: Final answer
    x = 84,813.87

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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.