Home / 99,774.20-149,661.30-86,943.80

Finding the Fourth Proportional to 99,774.20, 149,661.30 and 86,943.80

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Solution

The fourth proportional to 99,774.20, 149,661.30 and 86,943.80 is: 130,415.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,774.20 : 149,661.30 = 86,943.80 : x
  2. Step 2: Convert to fraction form
    99,774.20/149,661.30 = 86,943.80/x
  3. Step 3: Cross multiply
    99,774.20x = 149,661.30 × 86,943.80
  4. Step 4: Simplify right side
    99,774.20x = 13,012,122,134.94
  5. Step 5: Solve for x
    x = 13,012,122,134.94/99,774.20
  6. Step 6: Final answer
    x = 130,415.70

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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.