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Finding the Fourth Proportional to 123,705.66, 170,754.84 and 87,999.24

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Solution

The fourth proportional to 123,705.66, 170,754.84 and 87,999.24 is: 121,468.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,705.66 : 170,754.84 = 87,999.24 : x
  2. Step 2: Convert to fraction form
    123,705.66/170,754.84 = 87,999.24/x
  3. Step 3: Cross multiply
    123,705.66x = 170,754.84 × 87,999.24
  4. Step 4: Simplify right side
    123,705.66x = 15,026,296,146.32
  5. Step 5: Solve for x
    x = 15,026,296,146.32/123,705.66
  6. Step 6: Final answer
    x = 121,468.14

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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.