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Finding the Fourth Proportional to 68,437.83, 102,656.74 and 21,690.70

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Solution

The fourth proportional to 68,437.83, 102,656.74 and 21,690.70 is: 32,536.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,437.83 : 102,656.74 = 21,690.70 : x
  2. Step 2: Convert to fraction form
    68,437.83/102,656.74 = 21,690.70/x
  3. Step 3: Cross multiply
    68,437.83x = 102,656.74 × 21,690.70
  4. Step 4: Simplify right side
    68,437.83x = 2,226,696,918.57
  5. Step 5: Solve for x
    x = 2,226,696,918.57/68,437.83
  6. Step 6: Final answer
    x = 32,536.05

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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.