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Finding the Fourth Proportional to 77,445.40, 115,908.90 and 68,114.20

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Solution

The fourth proportional to 77,445.40, 115,908.90 and 68,114.20 is: 101,943.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,445.40 : 115,908.90 = 68,114.20 : x
  2. Step 2: Convert to fraction form
    77,445.40/115,908.90 = 68,114.20/x
  3. Step 3: Cross multiply
    77,445.40x = 115,908.90 × 68,114.20
  4. Step 4: Simplify right side
    77,445.40x = 7,895,041,996.38
  5. Step 5: Solve for x
    x = 7,895,041,996.38/77,445.40
  6. Step 6: Final answer
    x = 101,943.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.