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Finding the Fourth Proportional to 101,223.63, 139,746.90 and 67,278.15

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Solution

The fourth proportional to 101,223.63, 139,746.90 and 67,278.15 is: 92,882.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,223.63 : 139,746.90 = 67,278.15 : x
  2. Step 2: Convert to fraction form
    101,223.63/139,746.90 = 67,278.15/x
  3. Step 3: Cross multiply
    101,223.63x = 139,746.90 × 67,278.15
  4. Step 4: Simplify right side
    101,223.63x = 9,401,912,900.24
  5. Step 5: Solve for x
    x = 9,401,912,900.24/101,223.63
  6. Step 6: Final answer
    x = 92,882.59

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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.