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Finding the Fourth Proportional to 77,778.51, 107,108.46 and 67,564.87

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Solution

The fourth proportional to 77,778.51, 107,108.46 and 67,564.87 is: 93,043.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,778.51 : 107,108.46 = 67,564.87 : x
  2. Step 2: Convert to fraction form
    77,778.51/107,108.46 = 67,564.87/x
  3. Step 3: Cross multiply
    77,778.51x = 107,108.46 × 67,564.87
  4. Step 4: Simplify right side
    77,778.51x = 7,236,768,908.03
  5. Step 5: Solve for x
    x = 7,236,768,908.03/77,778.51
  6. Step 6: Final answer
    x = 93,043.30

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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.