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Finding the Fourth Proportional to 85,458.60, 128,210.30 and 32,869.80

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Solution

The fourth proportional to 85,458.60, 128,210.30 and 32,869.80 is: 49,313.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,458.60 : 128,210.30 = 32,869.80 : x
  2. Step 2: Convert to fraction form
    85,458.60/128,210.30 = 32,869.80/x
  3. Step 3: Cross multiply
    85,458.60x = 128,210.30 × 32,869.80
  4. Step 4: Simplify right side
    85,458.60x = 4,214,246,918.94
  5. Step 5: Solve for x
    x = 4,214,246,918.94/85,458.60
  6. Step 6: Final answer
    x = 49,313.32

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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.