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Finding the Fourth Proportional to 93,305.82, 139,958.88 and 28,390.80

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Solution

The fourth proportional to 93,305.82, 139,958.88 and 28,390.80 is: 42,586.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,305.82 : 139,958.88 = 28,390.80 : x
  2. Step 2: Convert to fraction form
    93,305.82/139,958.88 = 28,390.80/x
  3. Step 3: Cross multiply
    93,305.82x = 139,958.88 × 28,390.80
  4. Step 4: Simplify right side
    93,305.82x = 3,973,544,570.30
  5. Step 5: Solve for x
    x = 3,973,544,570.30/93,305.82
  6. Step 6: Final answer
    x = 42,586.25

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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.