Home / 85,401.60-128,114.55-26,228.40

Finding the Fourth Proportional to 85,401.60, 128,114.55 and 26,228.40

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Solution

The fourth proportional to 85,401.60, 128,114.55 and 26,228.40 is: 39,346.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,401.60 : 128,114.55 = 26,228.40 : x
  2. Step 2: Convert to fraction form
    85,401.60/128,114.55 = 26,228.40/x
  3. Step 3: Cross multiply
    85,401.60x = 128,114.55 × 26,228.40
  4. Step 4: Simplify right side
    85,401.60x = 3,360,239,663.22
  5. Step 5: Solve for x
    x = 3,360,239,663.22/85,401.60
  6. Step 6: Final answer
    x = 39,346.33

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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.