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Finding the Fourth Proportional to 73,212.40, 109,818.60 and 61,807.60

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Solution

The fourth proportional to 73,212.40, 109,818.60 and 61,807.60 is: 92,711.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.40 : 109,818.60 = 61,807.60 : x
  2. Step 2: Convert to fraction form
    73,212.40/109,818.60 = 61,807.60/x
  3. Step 3: Cross multiply
    73,212.40x = 109,818.60 × 61,807.60
  4. Step 4: Simplify right side
    73,212.40x = 6,787,624,101.36
  5. Step 5: Solve for x
    x = 6,787,624,101.36/73,212.40
  6. Step 6: Final answer
    x = 92,711.40

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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.