Home / 105,163.84-145,128.14-57,419.07

Finding the Fourth Proportional to 105,163.84, 145,128.14 and 57,419.07

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Solution

The fourth proportional to 105,163.84, 145,128.14 and 57,419.07 is: 79,239.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,163.84 : 145,128.14 = 57,419.07 : x
  2. Step 2: Convert to fraction form
    105,163.84/145,128.14 = 57,419.07/x
  3. Step 3: Cross multiply
    105,163.84x = 145,128.14 × 57,419.07
  4. Step 4: Simplify right side
    105,163.84x = 8,333,122,829.63
  5. Step 5: Solve for x
    x = 8,333,122,829.63/105,163.84
  6. Step 6: Final answer
    x = 79,239.43

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1.5x scale

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.