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Finding the Fourth Proportional to 247,100.68, 340,985.70 and 139,664.32

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Solution

The fourth proportional to 247,100.68, 340,985.70 and 139,664.32 is: 192,729.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,100.68 : 340,985.70 = 139,664.32 : x
  2. Step 2: Convert to fraction form
    247,100.68/340,985.70 = 139,664.32/x
  3. Step 3: Cross multiply
    247,100.68x = 340,985.70 × 139,664.32
  4. Step 4: Simplify right side
    247,100.68x = 47,623,535,920.22
  5. Step 5: Solve for x
    x = 47,623,535,920.22/247,100.68
  6. Step 6: Final answer
    x = 192,729.28

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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.