Home / 345,711.18-518,566.77-109,077.78

Finding the Fourth Proportional to 345,711.18, 518,566.77 and 109,077.78

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Solution

The fourth proportional to 345,711.18, 518,566.77 and 109,077.78 is: 163,616.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,711.18 : 518,566.77 = 109,077.78 : x
  2. Step 2: Convert to fraction form
    345,711.18/518,566.77 = 109,077.78/x
  3. Step 3: Cross multiply
    345,711.18x = 518,566.77 × 109,077.78
  4. Step 4: Simplify right side
    345,711.18x = 56,564,112,053.37
  5. Step 5: Solve for x
    x = 56,564,112,053.37/345,711.18
  6. Step 6: Final answer
    x = 163,616.67

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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.