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Finding the Fourth Proportional to 248,309.71, 342,643.66 and 139,389.08

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Solution

The fourth proportional to 248,309.71, 342,643.66 and 139,389.08 is: 192,343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,309.71 : 342,643.66 = 139,389.08 : x
  2. Step 2: Convert to fraction form
    248,309.71/342,643.66 = 139,389.08/x
  3. Step 3: Cross multiply
    248,309.71x = 342,643.66 × 139,389.08
  4. Step 4: Simplify right side
    248,309.71x = 47,760,782,473.54
  5. Step 5: Solve for x
    x = 47,760,782,473.54/248,309.71
  6. Step 6: Final answer
    x = 192,343.60

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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.