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Finding the Fourth Proportional to 218,487.48, 301,501.26 and 122,991

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Solution

The fourth proportional to 218,487.48, 301,501.26 and 122,991 is: 169,721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,487.48 : 301,501.26 = 122,991 : x
  2. Step 2: Convert to fraction form
    218,487.48/301,501.26 = 122,991/x
  3. Step 3: Cross multiply
    218,487.48x = 301,501.26 × 122,991
  4. Step 4: Simplify right side
    218,487.48x = 37,081,941,468.66
  5. Step 5: Solve for x
    x = 37,081,941,468.66/218,487.48
  6. Step 6: Final answer
    x = 169,721.13

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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.