Home / 103,628.85-155,352.15-70,240.65

Finding the Fourth Proportional to 103,628.85, 155,352.15 and 70,240.65

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Solution

The fourth proportional to 103,628.85, 155,352.15 and 70,240.65 is: 105,299.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,628.85 : 155,352.15 = 70,240.65 : x
  2. Step 2: Convert to fraction form
    103,628.85/155,352.15 = 70,240.65/x
  3. Step 3: Cross multiply
    103,628.85x = 155,352.15 × 70,240.65
  4. Step 4: Simplify right side
    103,628.85x = 10,912,035,994.90
  5. Step 5: Solve for x
    x = 10,912,035,994.90/103,628.85
  6. Step 6: Final answer
    x = 105,299.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.