Home / 103,738.80-155,608.20-99,188.40

Finding the Fourth Proportional to 103,738.80, 155,608.20 and 99,188.40

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Solution

The fourth proportional to 103,738.80, 155,608.20 and 99,188.40 is: 148,782.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,738.80 : 155,608.20 = 99,188.40 : x
  2. Step 2: Convert to fraction form
    103,738.80/155,608.20 = 99,188.40/x
  3. Step 3: Cross multiply
    103,738.80x = 155,608.20 × 99,188.40
  4. Step 4: Simplify right side
    103,738.80x = 15,434,528,384.88
  5. Step 5: Solve for x
    x = 15,434,528,384.88/103,738.80
  6. Step 6: Final answer
    x = 148,782.60

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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.