Home / 105,720.87-145,894.71-57,324.40

Finding the Fourth Proportional to 105,720.87, 145,894.71 and 57,324.40

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Solution

The fourth proportional to 105,720.87, 145,894.71 and 57,324.40 is: 79,107.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,720.87 : 145,894.71 = 57,324.40 : x
  2. Step 2: Convert to fraction form
    105,720.87/145,894.71 = 57,324.40/x
  3. Step 3: Cross multiply
    105,720.87x = 145,894.71 × 57,324.40
  4. Step 4: Simplify right side
    105,720.87x = 8,363,325,984.45
  5. Step 5: Solve for x
    x = 8,363,325,984.45/105,720.87
  6. Step 6: Final answer
    x = 79,107.62

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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.