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Finding the Fourth Proportional to 104,659.80, 156,989.70 and 55,507.80

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Solution

The fourth proportional to 104,659.80, 156,989.70 and 55,507.80 is: 83,261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,659.80 : 156,989.70 = 55,507.80 : x
  2. Step 2: Convert to fraction form
    104,659.80/156,989.70 = 55,507.80/x
  3. Step 3: Cross multiply
    104,659.80x = 156,989.70 × 55,507.80
  4. Step 4: Simplify right side
    104,659.80x = 8,714,152,869.66
  5. Step 5: Solve for x
    x = 8,714,152,869.66/104,659.80
  6. Step 6: Final answer
    x = 83,261.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.