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Finding the Fourth Proportional to 101,018, 139,464.64 and 89,809.04

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Solution

The fourth proportional to 101,018, 139,464.64 and 89,809.04 is: 123,989.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,018 : 139,464.64 = 89,809.04 : x
  2. Step 2: Convert to fraction form
    101,018/139,464.64 = 89,809.04/x
  3. Step 3: Cross multiply
    101,018x = 139,464.64 × 89,809.04
  4. Step 4: Simplify right side
    101,018x = 12,525,185,432.35
  5. Step 5: Solve for x
    x = 12,525,185,432.35/101,018
  6. Step 6: Final answer
    x = 123,989.64

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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.