Home / 78,635.98-117,848.88-28,669.14

Finding the Fourth Proportional to 78,635.98, 117,848.88 and 28,669.14

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Solution

The fourth proportional to 78,635.98, 117,848.88 and 28,669.14 is: 42,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,635.98 : 117,848.88 = 28,669.14 : x
  2. Step 2: Convert to fraction form
    78,635.98/117,848.88 = 28,669.14/x
  3. Step 3: Cross multiply
    78,635.98x = 117,848.88 × 28,669.14
  4. Step 4: Simplify right side
    78,635.98x = 3,378,626,039.56
  5. Step 5: Solve for x
    x = 3,378,626,039.56/78,635.98
  6. Step 6: Final answer
    x = 42,965.40

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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.