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Finding the Fourth Proportional to 121,699.63, 168,804.73 and 118,462.87

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Solution

The fourth proportional to 121,699.63, 168,804.73 and 118,462.87 is: 164,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,699.63 : 168,804.73 = 118,462.87 : x
  2. Step 2: Convert to fraction form
    121,699.63/168,804.73 = 118,462.87/x
  3. Step 3: Cross multiply
    121,699.63x = 168,804.73 × 118,462.87
  4. Step 4: Simplify right side
    121,699.63x = 19,997,092,785.38
  5. Step 5: Solve for x
    x = 19,997,092,785.38/121,699.63
  6. Step 6: Final answer
    x = 164,315.15

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.