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Finding the Fourth Proportional to 190,368, 262,345.68 and 139,396.32

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Solution

The fourth proportional to 190,368, 262,345.68 and 139,396.32 is: 192,101.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,368 : 262,345.68 = 139,396.32 : x
  2. Step 2: Convert to fraction form
    190,368/262,345.68 = 139,396.32/x
  3. Step 3: Cross multiply
    190,368x = 262,345.68 × 139,396.32
  4. Step 4: Simplify right side
    190,368x = 36,570,022,359.90
  5. Step 5: Solve for x
    x = 36,570,022,359.90/190,368
  6. Step 6: Final answer
    x = 192,101.73

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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.