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Finding the Fourth Proportional to 68,970.16, 103,447.45 and 19,057.38

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Solution

The fourth proportional to 68,970.16, 103,447.45 and 19,057.38 is: 28,583.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,970.16 : 103,447.45 = 19,057.38 : x
  2. Step 2: Convert to fraction form
    68,970.16/103,447.45 = 19,057.38/x
  3. Step 3: Cross multiply
    68,970.16x = 103,447.45 × 19,057.38
  4. Step 4: Simplify right side
    68,970.16x = 1,971,437,364.68
  5. Step 5: Solve for x
    x = 1,971,437,364.68/68,970.16
  6. Step 6: Final answer
    x = 28,583.92

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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.