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Finding the Fourth Proportional to 210,816.48, 290,994.48 and 139,260

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Solution

The fourth proportional to 210,816.48, 290,994.48 and 139,260 is: 192,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,816.48 : 290,994.48 = 139,260 : x
  2. Step 2: Convert to fraction form
    210,816.48/290,994.48 = 139,260/x
  3. Step 3: Cross multiply
    210,816.48x = 290,994.48 × 139,260
  4. Step 4: Simplify right side
    210,816.48x = 40,523,891,284.80
  5. Step 5: Solve for x
    x = 40,523,891,284.80/210,816.48
  6. Step 6: Final answer
    x = 192,223.55

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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.