Home / 152,486.20-228,511.36-85,787

Finding the Fourth Proportional to 152,486.20, 228,511.36 and 85,787

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Solution

The fourth proportional to 152,486.20, 228,511.36 and 85,787 is: 128,557.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,486.20 : 228,511.36 = 85,787 : x
  2. Step 2: Convert to fraction form
    152,486.20/228,511.36 = 85,787/x
  3. Step 3: Cross multiply
    152,486.20x = 228,511.36 × 85,787
  4. Step 4: Simplify right side
    152,486.20x = 19,603,304,040.32
  5. Step 5: Solve for x
    x = 19,603,304,040.32/152,486.20
  6. Step 6: Final answer
    x = 128,557.89

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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.