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Finding the Fourth Proportional to 138,453.65, 207,684.96 and 43,684.72

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Solution

The fourth proportional to 138,453.65, 207,684.96 and 43,684.72 is: 65,528.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,453.65 : 207,684.96 = 43,684.72 : x
  2. Step 2: Convert to fraction form
    138,453.65/207,684.96 = 43,684.72/x
  3. Step 3: Cross multiply
    138,453.65x = 207,684.96 × 43,684.72
  4. Step 4: Simplify right side
    138,453.65x = 9,072,658,888.51
  5. Step 5: Solve for x
    x = 9,072,658,888.51/138,453.65
  6. Step 6: Final answer
    x = 65,528.49

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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.