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Finding the Fourth Proportional to 125,321.50, 172,943.67 and 68,733.01

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Solution

The fourth proportional to 125,321.50, 172,943.67 and 68,733.01 is: 94,851.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,321.50 : 172,943.67 = 68,733.01 : x
  2. Step 2: Convert to fraction form
    125,321.50/172,943.67 = 68,733.01/x
  3. Step 3: Cross multiply
    125,321.50x = 172,943.67 × 68,733.01
  4. Step 4: Simplify right side
    125,321.50x = 11,886,938,999.55
  5. Step 5: Solve for x
    x = 11,886,938,999.55/125,321.50
  6. Step 6: Final answer
    x = 94,851.55

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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.