Home / 105,383.54-145,431.45-57,639.98

Finding the Fourth Proportional to 105,383.54, 145,431.45 and 57,639.98

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Solution

The fourth proportional to 105,383.54, 145,431.45 and 57,639.98 is: 79,544.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,383.54 : 145,431.45 = 57,639.98 : x
  2. Step 2: Convert to fraction form
    105,383.54/145,431.45 = 57,639.98/x
  3. Step 3: Cross multiply
    105,383.54x = 145,431.45 × 57,639.98
  4. Step 4: Simplify right side
    105,383.54x = 8,382,665,142.21
  5. Step 5: Solve for x
    x = 8,382,665,142.21/105,383.54
  6. Step 6: Final answer
    x = 79,544.35

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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.