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Finding the Fourth Proportional to 122,483.40, 169,045.56 and 74,764.41

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Solution

The fourth proportional to 122,483.40, 169,045.56 and 74,764.41 is: 103,186.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,483.40 : 169,045.56 = 74,764.41 : x
  2. Step 2: Convert to fraction form
    122,483.40/169,045.56 = 74,764.41/x
  3. Step 3: Cross multiply
    122,483.40x = 169,045.56 × 74,764.41
  4. Step 4: Simplify right side
    122,483.40x = 12,638,591,556.52
  5. Step 5: Solve for x
    x = 12,638,591,556.52/122,483.40
  6. Step 6: Final answer
    x = 103,186.16

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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.