Home / 85,778.09-128,717.71-35,854.35

Finding the Fourth Proportional to 85,778.09, 128,717.71 and 35,854.35

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Solution

The fourth proportional to 85,778.09, 128,717.71 and 35,854.35 is: 53,802.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,778.09 : 128,717.71 = 35,854.35 : x
  2. Step 2: Convert to fraction form
    85,778.09/128,717.71 = 35,854.35/x
  3. Step 3: Cross multiply
    85,778.09x = 128,717.71 × 35,854.35
  4. Step 4: Simplify right side
    85,778.09x = 4,615,089,253.21
  5. Step 5: Solve for x
    x = 4,615,089,253.21/85,778.09
  6. Step 6: Final answer
    x = 53,802.66

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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.