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Finding the Fourth Proportional to 139,319.53, 192,319.80 and 94,058.81

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Solution

The fourth proportional to 139,319.53, 192,319.80 and 94,058.81 is: 129,840.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,319.53 : 192,319.80 = 94,058.81 : x
  2. Step 2: Convert to fraction form
    139,319.53/192,319.80 = 94,058.81/x
  3. Step 3: Cross multiply
    139,319.53x = 192,319.80 × 94,058.81
  4. Step 4: Simplify right side
    139,319.53x = 18,089,371,057.14
  5. Step 5: Solve for x
    x = 18,089,371,057.14/139,319.53
  6. Step 6: Final answer
    x = 129,840.89

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Why These Related Problems?

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