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Finding the Fourth Proportional to 122,530.31, 169,126.74 and 71,554.98

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Solution

The fourth proportional to 122,530.31, 169,126.74 and 71,554.98 is: 98,766.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,530.31 : 169,126.74 = 71,554.98 : x
  2. Step 2: Convert to fraction form
    122,530.31/169,126.74 = 71,554.98/x
  3. Step 3: Cross multiply
    122,530.31x = 169,126.74 × 71,554.98
  4. Step 4: Simplify right side
    122,530.31x = 12,101,860,498.17
  5. Step 5: Solve for x
    x = 12,101,860,498.17/122,530.31
  6. Step 6: Final answer
    x = 98,766.26

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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.