Home / 156,881.20-235,451.40-72,770.80

Finding the Fourth Proportional to 156,881.20, 235,451.40 and 72,770.80

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Solution

The fourth proportional to 156,881.20, 235,451.40 and 72,770.80 is: 109,216.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,881.20 : 235,451.40 = 72,770.80 : x
  2. Step 2: Convert to fraction form
    156,881.20/235,451.40 = 72,770.80/x
  3. Step 3: Cross multiply
    156,881.20x = 235,451.40 × 72,770.80
  4. Step 4: Simplify right side
    156,881.20x = 17,133,986,739.12
  5. Step 5: Solve for x
    x = 17,133,986,739.12/156,881.20
  6. Step 6: Final answer
    x = 109,216.32

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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.