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Finding the Fourth Proportional to 101,008.32, 139,392.45 and 55,687.96

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Solution

The fourth proportional to 101,008.32, 139,392.45 and 55,687.96 is: 76,849.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,008.32 : 139,392.45 = 55,687.96 : x
  2. Step 2: Convert to fraction form
    101,008.32/139,392.45 = 55,687.96/x
  3. Step 3: Cross multiply
    101,008.32x = 139,392.45 × 55,687.96
  4. Step 4: Simplify right side
    101,008.32x = 7,762,480,901.46
  5. Step 5: Solve for x
    x = 7,762,480,901.46/101,008.32
  6. Step 6: Final answer
    x = 76,849.92

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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.