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Finding the Fourth Proportional to 292,129.56, 438,257.79 and 89,726.40

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Solution

The fourth proportional to 292,129.56, 438,257.79 and 89,726.40 is: 134,609.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,129.56 : 438,257.79 = 89,726.40 : x
  2. Step 2: Convert to fraction form
    292,129.56/438,257.79 = 89,726.40/x
  3. Step 3: Cross multiply
    292,129.56x = 438,257.79 × 89,726.40
  4. Step 4: Simplify right side
    292,129.56x = 39,323,293,768.66
  5. Step 5: Solve for x
    x = 39,323,293,768.66/292,129.56
  6. Step 6: Final answer
    x = 134,609.09

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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.