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Finding the Fourth Proportional to 161,707.35, 221,539.87 and 155,646.85

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Solution

The fourth proportional to 161,707.35, 221,539.87 and 155,646.85 is: 213,236.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,707.35 : 221,539.87 = 155,646.85 : x
  2. Step 2: Convert to fraction form
    161,707.35/221,539.87 = 155,646.85/x
  3. Step 3: Cross multiply
    161,707.35x = 221,539.87 × 155,646.85
  4. Step 4: Simplify right side
    161,707.35x = 34,481,982,914.91
  5. Step 5: Solve for x
    x = 34,481,982,914.91/161,707.35
  6. Step 6: Final answer
    x = 213,236.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.