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Finding the Fourth Proportional to 68,888.73, 103,333.65 and 18,971.58

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Solution

The fourth proportional to 68,888.73, 103,333.65 and 18,971.58 is: 28,457.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,888.73 : 103,333.65 = 18,971.58 : x
  2. Step 2: Convert to fraction form
    68,888.73/103,333.65 = 18,971.58/x
  3. Step 3: Cross multiply
    68,888.73x = 103,333.65 × 18,971.58
  4. Step 4: Simplify right side
    68,888.73x = 1,960,402,607.67
  5. Step 5: Solve for x
    x = 1,960,402,607.67/68,888.73
  6. Step 6: Final answer
    x = 28,457.52

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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.