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Finding the Fourth Proportional to 112,980, 155,912.40 and 62,679.36

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Solution

The fourth proportional to 112,980, 155,912.40 and 62,679.36 is: 86,497.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,980 : 155,912.40 = 62,679.36 : x
  2. Step 2: Convert to fraction form
    112,980/155,912.40 = 62,679.36/x
  3. Step 3: Cross multiply
    112,980x = 155,912.40 × 62,679.36
  4. Step 4: Simplify right side
    112,980x = 9,772,489,448.06
  5. Step 5: Solve for x
    x = 9,772,489,448.06/112,980
  6. Step 6: Final answer
    x = 86,497.52

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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.