Home / 123,029,261.37-169,700,388.32-78,906,372.35

Finding the Fourth Proportional to 123,029,261.37, 169,700,388.32 and 78,906,372.35

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Solution

The fourth proportional to 123,029,261.37, 169,700,388.32 and 78,906,372.35 is: 108,839,489.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,029,261.37 : 169,700,388.32 = 78,906,372.35 : x
  2. Step 2: Convert to fraction form
    123,029,261.37/169,700,388.32 = 78,906,372.35/x
  3. Step 3: Cross multiply
    123,029,261.37x = 169,700,388.32 × 78,906,372.35
  4. Step 4: Simplify right side
    123,029,261.37x = 13,390,442,028,066,274
  5. Step 5: Solve for x
    x = 13,390,442,028,066,274/123,029,261.37
  6. Step 6: Final answer
    x = 108,839,489.72

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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.