Home / 133,128.78-183,716.28-72,699.24

Finding the Fourth Proportional to 133,128.78, 183,716.28 and 72,699.24

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Solution

The fourth proportional to 133,128.78, 183,716.28 and 72,699.24 is: 100,324.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,128.78 : 183,716.28 = 72,699.24 : x
  2. Step 2: Convert to fraction form
    133,128.78/183,716.28 = 72,699.24/x
  3. Step 3: Cross multiply
    133,128.78x = 183,716.28 × 72,699.24
  4. Step 4: Simplify right side
    133,128.78x = 13,356,033,931.63
  5. Step 5: Solve for x
    x = 13,356,033,931.63/133,128.78
  6. Step 6: Final answer
    x = 100,324.17

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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.