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Finding the Fourth Proportional to 68,492.70, 102,690.45 and 31,070.70

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Solution

The fourth proportional to 68,492.70, 102,690.45 and 31,070.70 is: 46,584.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,492.70 : 102,690.45 = 31,070.70 : x
  2. Step 2: Convert to fraction form
    68,492.70/102,690.45 = 31,070.70/x
  3. Step 3: Cross multiply
    68,492.70x = 102,690.45 × 31,070.70
  4. Step 4: Simplify right side
    68,492.70x = 3,190,664,164.82
  5. Step 5: Solve for x
    x = 3,190,664,164.82/68,492.70
  6. Step 6: Final answer
    x = 46,584.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.