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Finding the Fourth Proportional to 158,545.38, 218,665.58 and 139,384.43

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Solution

The fourth proportional to 158,545.38, 218,665.58 and 139,384.43 is: 192,238.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,545.38 : 218,665.58 = 139,384.43 : x
  2. Step 2: Convert to fraction form
    158,545.38/218,665.58 = 139,384.43/x
  3. Step 3: Cross multiply
    158,545.38x = 218,665.58 × 139,384.43
  4. Step 4: Simplify right side
    158,545.38x = 30,478,576,258.67
  5. Step 5: Solve for x
    x = 30,478,576,258.67/158,545.38
  6. Step 6: Final answer
    x = 192,238.81

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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.