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Finding the Fourth Proportional to 70,811.94, 97,718.76 and 38,980.56

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Solution

The fourth proportional to 70,811.94, 97,718.76 and 38,980.56 is: 53,792.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,811.94 : 97,718.76 = 38,980.56 : x
  2. Step 2: Convert to fraction form
    70,811.94/97,718.76 = 38,980.56/x
  3. Step 3: Cross multiply
    70,811.94x = 97,718.76 × 38,980.56
  4. Step 4: Simplify right side
    70,811.94x = 3,809,131,987.31
  5. Step 5: Solve for x
    x = 3,809,131,987.31/70,811.94
  6. Step 6: Final answer
    x = 53,792.23

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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.