Home / 89,385.12-133,438.05-86,268.51

Finding the Fourth Proportional to 89,385.12, 133,438.05 and 86,268.51

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Solution

The fourth proportional to 89,385.12, 133,438.05 and 86,268.51 is: 128,785.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,385.12 : 133,438.05 = 86,268.51 : x
  2. Step 2: Convert to fraction form
    89,385.12/133,438.05 = 86,268.51/x
  3. Step 3: Cross multiply
    89,385.12x = 133,438.05 × 86,268.51
  4. Step 4: Simplify right side
    89,385.12x = 11,511,501,750.81
  5. Step 5: Solve for x
    x = 11,511,501,750.81/89,385.12
  6. Step 6: Final answer
    x = 128,785.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.