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Finding the Fourth Proportional to 85,328.40, 128,041.20 and 32,775.60

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Solution

The fourth proportional to 85,328.40, 128,041.20 and 32,775.60 is: 49,182.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,328.40 : 128,041.20 = 32,775.60 : x
  2. Step 2: Convert to fraction form
    85,328.40/128,041.20 = 32,775.60/x
  3. Step 3: Cross multiply
    85,328.40x = 128,041.20 × 32,775.60
  4. Step 4: Simplify right side
    85,328.40x = 4,196,627,154.72
  5. Step 5: Solve for x
    x = 4,196,627,154.72/85,328.40
  6. Step 6: Final answer
    x = 49,182.07

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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.