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Finding the Fourth Proportional to 122,484.90, 169,047.63 and 74,765.91

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Solution

The fourth proportional to 122,484.90, 169,047.63 and 74,765.91 is: 103,188.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,484.90 : 169,047.63 = 74,765.91 : x
  2. Step 2: Convert to fraction form
    122,484.90/169,047.63 = 74,765.91/x
  3. Step 3: Cross multiply
    122,484.90x = 169,047.63 × 74,765.91
  4. Step 4: Simplify right side
    122,484.90x = 12,638,999,890.29
  5. Step 5: Solve for x
    x = 12,638,999,890.29/122,484.90
  6. Step 6: Final answer
    x = 103,188.23

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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.