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Finding the Fourth Proportional to 85,953.81, 128,930.60 and 32,645.69

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Solution

The fourth proportional to 85,953.81, 128,930.60 and 32,645.69 is: 48,968.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953.81 : 128,930.60 = 32,645.69 : x
  2. Step 2: Convert to fraction form
    85,953.81/128,930.60 = 32,645.69/x
  3. Step 3: Cross multiply
    85,953.81x = 128,930.60 × 32,645.69
  4. Step 4: Simplify right side
    85,953.81x = 4,209,027,836.08
  5. Step 5: Solve for x
    x = 4,209,027,836.08/85,953.81
  6. Step 6: Final answer
    x = 48,968.48

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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.