Home / 74,431.82-102,415.78-72,660.35

Finding the Fourth Proportional to 74,431.82, 102,415.78 and 72,660.35

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Solution

The fourth proportional to 74,431.82, 102,415.78 and 72,660.35 is: 99,978.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,431.82 : 102,415.78 = 72,660.35 : x
  2. Step 2: Convert to fraction form
    74,431.82/102,415.78 = 72,660.35/x
  3. Step 3: Cross multiply
    74,431.82x = 102,415.78 × 72,660.35
  4. Step 4: Simplify right side
    74,431.82x = 7,441,566,420.32
  5. Step 5: Solve for x
    x = 7,441,566,420.32/74,431.82
  6. Step 6: Final answer
    x = 99,978.29

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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.