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Finding the Fourth Proportional to 70,338.81, 97,076.80 and 40,117.20

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Solution

The fourth proportional to 70,338.81, 97,076.80 and 40,117.20 is: 55,367.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,338.81 : 97,076.80 = 40,117.20 : x
  2. Step 2: Convert to fraction form
    70,338.81/97,076.80 = 40,117.20/x
  3. Step 3: Cross multiply
    70,338.81x = 97,076.80 × 40,117.20
  4. Step 4: Simplify right side
    70,338.81x = 3,894,449,200.37
  5. Step 5: Solve for x
    x = 3,894,449,200.37/70,338.81
  6. Step 6: Final answer
    x = 55,367.01

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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.