Home / 147,778.40-221,667.60-85,416.80

Finding the Fourth Proportional to 147,778.40, 221,667.60 and 85,416.80

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Solution

The fourth proportional to 147,778.40, 221,667.60 and 85,416.80 is: 128,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,778.40 : 221,667.60 = 85,416.80 : x
  2. Step 2: Convert to fraction form
    147,778.40/221,667.60 = 85,416.80/x
  3. Step 3: Cross multiply
    147,778.40x = 221,667.60 × 85,416.80
  4. Step 4: Simplify right side
    147,778.40x = 18,934,137,055.68
  5. Step 5: Solve for x
    x = 18,934,137,055.68/147,778.40
  6. Step 6: Final answer
    x = 128,125.20

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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.