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Finding the Fourth Proportional to 292,065.89, 438,129.59 and 121,268.21

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Solution

The fourth proportional to 292,065.89, 438,129.59 and 121,268.21 is: 181,915.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,065.89 : 438,129.59 = 121,268.21 : x
  2. Step 2: Convert to fraction form
    292,065.89/438,129.59 = 121,268.21/x
  3. Step 3: Cross multiply
    292,065.89x = 438,129.59 × 121,268.21
  4. Step 4: Simplify right side
    292,065.89x = 53,131,188,330.34
  5. Step 5: Solve for x
    x = 53,131,188,330.34/292,065.89
  6. Step 6: Final answer
    x = 181,915.08

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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.