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Finding the Fourth Proportional to 99,516.10, 148,946.10 and 69,991.60

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Solution

The fourth proportional to 99,516.10, 148,946.10 and 69,991.60 is: 104,756.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,516.10 : 148,946.10 = 69,991.60 : x
  2. Step 2: Convert to fraction form
    99,516.10/148,946.10 = 69,991.60/x
  3. Step 3: Cross multiply
    99,516.10x = 148,946.10 × 69,991.60
  4. Step 4: Simplify right side
    99,516.10x = 10,424,975,852.76
  5. Step 5: Solve for x
    x = 10,424,975,852.76/99,516.10
  6. Step 6: Final answer
    x = 104,756.68

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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.