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Finding the Fourth Proportional to 101,234, 139,711.56 and 56,530.64

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Solution

The fourth proportional to 101,234, 139,711.56 and 56,530.64 is: 78,017.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,234 : 139,711.56 = 56,530.64 : x
  2. Step 2: Convert to fraction form
    101,234/139,711.56 = 56,530.64/x
  3. Step 3: Cross multiply
    101,234x = 139,711.56 × 56,530.64
  4. Step 4: Simplify right side
    101,234x = 7,897,983,902.20
  5. Step 5: Solve for x
    x = 7,897,983,902.20/101,234
  6. Step 6: Final answer
    x = 78,017.11

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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.