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Finding the Fourth Proportional to 117,061, 161,492.70 and 68,638.21

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Solution

The fourth proportional to 117,061, 161,492.70 and 68,638.21 is: 94,690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,061 : 161,492.70 = 68,638.21 : x
  2. Step 2: Convert to fraction form
    117,061/161,492.70 = 68,638.21/x
  3. Step 3: Cross multiply
    117,061x = 161,492.70 × 68,638.21
  4. Step 4: Simplify right side
    117,061x = 11,084,569,856.07
  5. Step 5: Solve for x
    x = 11,084,569,856.07/117,061
  6. Step 6: Final answer
    x = 94,690.54

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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.