Home / 123,009.42-169,780.62-80,543.28

Finding the Fourth Proportional to 123,009.42, 169,780.62 and 80,543.28

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Solution

The fourth proportional to 123,009.42, 169,780.62 and 80,543.28 is: 111,167.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,009.42 : 169,780.62 = 80,543.28 : x
  2. Step 2: Convert to fraction form
    123,009.42/169,780.62 = 80,543.28/x
  3. Step 3: Cross multiply
    123,009.42x = 169,780.62 × 80,543.28
  4. Step 4: Simplify right side
    123,009.42x = 13,674,688,015.23
  5. Step 5: Solve for x
    x = 13,674,688,015.23/123,009.42
  6. Step 6: Final answer
    x = 111,167.81

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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.