Home / 105,535.77-145,639.59-57,138.22

Finding the Fourth Proportional to 105,535.77, 145,639.59 and 57,138.22

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Solution

The fourth proportional to 105,535.77, 145,639.59 and 57,138.22 is: 78,850.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,535.77 : 145,639.59 = 57,138.22 : x
  2. Step 2: Convert to fraction form
    105,535.77/145,639.59 = 57,138.22/x
  3. Step 3: Cross multiply
    105,535.77x = 145,639.59 × 57,138.22
  4. Step 4: Simplify right side
    105,535.77x = 8,321,586,934.13
  5. Step 5: Solve for x
    x = 8,321,586,934.13/105,535.77
  6. Step 6: Final answer
    x = 78,850.87

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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.