Home / 105,509.85-145,603.80-57,766.23

Finding the Fourth Proportional to 105,509.85, 145,603.80 and 57,766.23

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Solution

The fourth proportional to 105,509.85, 145,603.80 and 57,766.23 is: 79,717.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,509.85 : 145,603.80 = 57,766.23 : x
  2. Step 2: Convert to fraction form
    105,509.85/145,603.80 = 57,766.23/x
  3. Step 3: Cross multiply
    105,509.85x = 145,603.80 × 57,766.23
  4. Step 4: Simplify right side
    105,509.85x = 8,410,982,599.67
  5. Step 5: Solve for x
    x = 8,410,982,599.67/105,509.85
  6. Step 6: Final answer
    x = 79,717.51

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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.