Home / 105,391.14-145,440.93-57,643.47

Finding the Fourth Proportional to 105,391.14, 145,440.93 and 57,643.47

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Solution

The fourth proportional to 105,391.14, 145,440.93 and 57,643.47 is: 79,548.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,391.14 : 145,440.93 = 57,643.47 : x
  2. Step 2: Convert to fraction form
    105,391.14/145,440.93 = 57,643.47/x
  3. Step 3: Cross multiply
    105,391.14x = 145,440.93 × 57,643.47
  4. Step 4: Simplify right side
    105,391.14x = 8,383,719,885.23
  5. Step 5: Solve for x
    x = 8,383,719,885.23/105,391.14
  6. Step 6: Final answer
    x = 79,548.62

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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.