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Finding the Fourth Proportional to 77,040.65, 106,070.78 and 67,958.21

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Solution

The fourth proportional to 77,040.65, 106,070.78 and 67,958.21 is: 93,565.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,040.65 : 106,070.78 = 67,958.21 : x
  2. Step 2: Convert to fraction form
    77,040.65/106,070.78 = 67,958.21/x
  3. Step 3: Cross multiply
    77,040.65x = 106,070.78 × 67,958.21
  4. Step 4: Simplify right side
    77,040.65x = 7,208,380,777.18
  5. Step 5: Solve for x
    x = 7,208,380,777.18/77,040.65
  6. Step 6: Final answer
    x = 93,565.94

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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.