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Finding the Fourth Proportional to 73,756.48, 109,992.80 and 69,615.76

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Solution

The fourth proportional to 73,756.48, 109,992.80 and 69,615.76 is: 103,817.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,756.48 : 109,992.80 = 69,615.76 : x
  2. Step 2: Convert to fraction form
    73,756.48/109,992.80 = 69,615.76/x
  3. Step 3: Cross multiply
    73,756.48x = 109,992.80 × 69,615.76
  4. Step 4: Simplify right side
    73,756.48x = 7,657,232,366.53
  5. Step 5: Solve for x
    x = 7,657,232,366.53/73,756.48
  6. Step 6: Final answer
    x = 103,817.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.