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Finding the Fourth Proportional to 77,019.45, 106,287.56 and 45,188.88

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Solution

The fourth proportional to 77,019.45, 106,287.56 and 45,188.88 is: 62,361.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,019.45 : 106,287.56 = 45,188.88 : x
  2. Step 2: Convert to fraction form
    77,019.45/106,287.56 = 45,188.88/x
  3. Step 3: Cross multiply
    77,019.45x = 106,287.56 × 45,188.88
  4. Step 4: Simplify right side
    77,019.45x = 4,803,015,794.33
  5. Step 5: Solve for x
    x = 4,803,015,794.33/77,019.45
  6. Step 6: Final answer
    x = 62,361.08

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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.