Home / 123,220.80-169,966.40-80,782.06

Finding the Fourth Proportional to 123,220.80, 169,966.40 and 80,782.06

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Solution

The fourth proportional to 123,220.80, 169,966.40 and 80,782.06 is: 111,427.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,220.80 : 169,966.40 = 80,782.06 : x
  2. Step 2: Convert to fraction form
    123,220.80/169,966.40 = 80,782.06/x
  3. Step 3: Cross multiply
    123,220.80x = 169,966.40 × 80,782.06
  4. Step 4: Simplify right side
    123,220.80x = 13,730,235,922.78
  5. Step 5: Solve for x
    x = 13,730,235,922.78/123,220.80
  6. Step 6: Final answer
    x = 111,427.91

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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.