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Finding the Fourth Proportional to 77,990.41, 116,987.43 and 25,403.98

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Solution

The fourth proportional to 77,990.41, 116,987.43 and 25,403.98 is: 38,106.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,990.41 : 116,987.43 = 25,403.98 : x
  2. Step 2: Convert to fraction form
    77,990.41/116,987.43 = 25,403.98/x
  3. Step 3: Cross multiply
    77,990.41x = 116,987.43 × 25,403.98
  4. Step 4: Simplify right side
    77,990.41x = 2,971,946,331.97
  5. Step 5: Solve for x
    x = 2,971,946,331.97/77,990.41
  6. Step 6: Final answer
    x = 38,106.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.