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Finding the Fourth Proportional to 101,340.90, 139,849.74 and 56,628.90

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Solution

The fourth proportional to 101,340.90, 139,849.74 and 56,628.90 is: 78,147.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,340.90 : 139,849.74 = 56,628.90 : x
  2. Step 2: Convert to fraction form
    101,340.90/139,849.74 = 56,628.90/x
  3. Step 3: Cross multiply
    101,340.90x = 139,849.74 × 56,628.90
  4. Step 4: Simplify right side
    101,340.90x = 7,919,536,941.49
  5. Step 5: Solve for x
    x = 7,919,536,941.49/101,340.90
  6. Step 6: Final answer
    x = 78,147.49

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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.