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Finding the Fourth Proportional to 223,459.15, 308,379.71 and 121,491.47

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Solution

The fourth proportional to 223,459.15, 308,379.71 and 121,491.47 is: 167,661.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,459.15 : 308,379.71 = 121,491.47 : x
  2. Step 2: Convert to fraction form
    223,459.15/308,379.71 = 121,491.47/x
  3. Step 3: Cross multiply
    223,459.15x = 308,379.71 × 121,491.47
  4. Step 4: Simplify right side
    223,459.15x = 37,465,502,136.72
  5. Step 5: Solve for x
    x = 37,465,502,136.72/223,459.15
  6. Step 6: Final answer
    x = 167,661.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.