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Finding the Fourth Proportional to 100,765.34, 139,056.82 and 55,446.20

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Solution

The fourth proportional to 100,765.34, 139,056.82 and 55,446.20 is: 76,516.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,765.34 : 139,056.82 = 55,446.20 : x
  2. Step 2: Convert to fraction form
    100,765.34/139,056.82 = 55,446.20/x
  3. Step 3: Cross multiply
    100,765.34x = 139,056.82 × 55,446.20
  4. Step 4: Simplify right side
    100,765.34x = 7,710,172,253.08
  5. Step 5: Solve for x
    x = 7,710,172,253.08/100,765.34
  6. Step 6: Final answer
    x = 76,516.11

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1.5x scale

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.