Home / 89,128.40-133,846.20-86,363.60

Finding the Fourth Proportional to 89,128.40, 133,846.20 and 86,363.60

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Solution

The fourth proportional to 89,128.40, 133,846.20 and 86,363.60 is: 129,694.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,128.40 : 133,846.20 = 86,363.60 : x
  2. Step 2: Convert to fraction form
    89,128.40/133,846.20 = 86,363.60/x
  3. Step 3: Cross multiply
    89,128.40x = 133,846.20 × 86,363.60
  4. Step 4: Simplify right side
    89,128.40x = 11,559,439,678.32
  5. Step 5: Solve for x
    x = 11,559,439,678.32/89,128.40
  6. Step 6: Final answer
    x = 129,694.24

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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.