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Finding the Fourth Proportional to 102,990.67, 154,501.80 and 43,810.45

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Solution

The fourth proportional to 102,990.67, 154,501.80 and 43,810.45 is: 65,722.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.67 : 154,501.80 = 43,810.45 : x
  2. Step 2: Convert to fraction form
    102,990.67/154,501.80 = 43,810.45/x
  3. Step 3: Cross multiply
    102,990.67x = 154,501.80 × 43,810.45
  4. Step 4: Simplify right side
    102,990.67x = 6,768,793,383.81
  5. Step 5: Solve for x
    x = 6,768,793,383.81/102,990.67
  6. Step 6: Final answer
    x = 65,722.39

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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.