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Finding the Fourth Proportional to 103,410.78, 155,130.75 and 36,831.21

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Solution

The fourth proportional to 103,410.78, 155,130.75 and 36,831.21 is: 55,252.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,410.78 : 155,130.75 = 36,831.21 : x
  2. Step 2: Convert to fraction form
    103,410.78/155,130.75 = 36,831.21/x
  3. Step 3: Cross multiply
    103,410.78x = 155,130.75 × 36,831.21
  4. Step 4: Simplify right side
    103,410.78x = 5,713,653,230.71
  5. Step 5: Solve for x
    x = 5,713,653,230.71/103,410.78
  6. Step 6: Final answer
    x = 55,252.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.