Home / 123,220.20-170,070.44-77,869.40

Finding the Fourth Proportional to 123,220.20, 170,070.44 and 77,869.40

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Solution

The fourth proportional to 123,220.20, 170,070.44 and 77,869.40 is: 107,476.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,220.20 : 170,070.44 = 77,869.40 : x
  2. Step 2: Convert to fraction form
    123,220.20/170,070.44 = 77,869.40/x
  3. Step 3: Cross multiply
    123,220.20x = 170,070.44 × 77,869.40
  4. Step 4: Simplify right side
    123,220.20x = 13,243,283,120.54
  5. Step 5: Solve for x
    x = 13,243,283,120.54/123,220.20
  6. Step 6: Final answer
    x = 107,476.56

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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.