Home / 105,125.04-145,072.35-57,378.78

Finding the Fourth Proportional to 105,125.04, 145,072.35 and 57,378.78

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Solution

The fourth proportional to 105,125.04, 145,072.35 and 57,378.78 is: 79,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,125.04 : 145,072.35 = 57,378.78 : x
  2. Step 2: Convert to fraction form
    105,125.04/145,072.35 = 57,378.78/x
  3. Step 3: Cross multiply
    105,125.04x = 145,072.35 × 57,378.78
  4. Step 4: Simplify right side
    105,125.04x = 8,324,074,454.73
  5. Step 5: Solve for x
    x = 8,324,074,454.73/105,125.04
  6. Step 6: Final answer
    x = 79,182.60

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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.