Home / 81,866.40-113,047.20-51,705.60

Finding the Fourth Proportional to 81,866.40, 113,047.20 and 51,705.60

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Solution

The fourth proportional to 81,866.40, 113,047.20 and 51,705.60 is: 71,398.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,866.40 : 113,047.20 = 51,705.60 : x
  2. Step 2: Convert to fraction form
    81,866.40/113,047.20 = 51,705.60/x
  3. Step 3: Cross multiply
    81,866.40x = 113,047.20 × 51,705.60
  4. Step 4: Simplify right side
    81,866.40x = 5,845,173,304.32
  5. Step 5: Solve for x
    x = 5,845,173,304.32/81,866.40
  6. Step 6: Final answer
    x = 71,398.93

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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.