Home / 109,619.10-164,428.65-87,311.70

Finding the Fourth Proportional to 109,619.10, 164,428.65 and 87,311.70

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Solution

The fourth proportional to 109,619.10, 164,428.65 and 87,311.70 is: 130,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,619.10 : 164,428.65 = 87,311.70 : x
  2. Step 2: Convert to fraction form
    109,619.10/164,428.65 = 87,311.70/x
  3. Step 3: Cross multiply
    109,619.10x = 164,428.65 × 87,311.70
  4. Step 4: Simplify right side
    109,619.10x = 14,356,544,960.21
  5. Step 5: Solve for x
    x = 14,356,544,960.21/109,619.10
  6. Step 6: Final answer
    x = 130,967.55

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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.