Home / 105,506.85-145,599.45-57,760.20

Finding the Fourth Proportional to 105,506.85, 145,599.45 and 57,760.20

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Solution

The fourth proportional to 105,506.85, 145,599.45 and 57,760.20 is: 79,709.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,506.85 : 145,599.45 = 57,760.20 : x
  2. Step 2: Convert to fraction form
    105,506.85/145,599.45 = 57,760.20/x
  3. Step 3: Cross multiply
    105,506.85x = 145,599.45 × 57,760.20
  4. Step 4: Simplify right side
    105,506.85x = 8,409,852,843.49
  5. Step 5: Solve for x
    x = 8,409,852,843.49/105,506.85
  6. Step 6: Final answer
    x = 79,709.07

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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.