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Finding the Fourth Proportional to 77,712.87, 107,247.70 and 45,881.08

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Solution

The fourth proportional to 77,712.87, 107,247.70 and 45,881.08 is: 63,318.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,712.87 : 107,247.70 = 45,881.08 : x
  2. Step 2: Convert to fraction form
    77,712.87/107,247.70 = 45,881.08/x
  3. Step 3: Cross multiply
    77,712.87x = 107,247.70 × 45,881.08
  4. Step 4: Simplify right side
    77,712.87x = 4,920,640,303.52
  5. Step 5: Solve for x
    x = 4,920,640,303.52/77,712.87
  6. Step 6: Final answer
    x = 63,318.22

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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.