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Finding the Fourth Proportional to 78,578, 108,437.64 and 43,250

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Solution

The fourth proportional to 78,578, 108,437.64 and 43,250 is: 59,685

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,578 : 108,437.64 = 43,250 : x
  2. Step 2: Convert to fraction form
    78,578/108,437.64 = 43,250/x
  3. Step 3: Cross multiply
    78,578x = 108,437.64 × 43,250
  4. Step 4: Simplify right side
    78,578x = 4,689,927,930
  5. Step 5: Solve for x
    x = 4,689,927,930/78,578
  6. Step 6: Final answer
    x = 59,685

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.