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Finding the Fourth Proportional to 77,378.59, 106,087.04 and 75,978.91

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Solution

The fourth proportional to 77,378.59, 106,087.04 and 75,978.91 is: 104,168.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,378.59 : 106,087.04 = 75,978.91 : x
  2. Step 2: Convert to fraction form
    77,378.59/106,087.04 = 75,978.91/x
  3. Step 3: Cross multiply
    77,378.59x = 106,087.04 × 75,978.91
  4. Step 4: Simplify right side
    77,378.59x = 8,060,377,664.33
  5. Step 5: Solve for x
    x = 8,060,377,664.33/77,378.59
  6. Step 6: Final answer
    x = 104,168.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.