Home / 120,724.50-166,599.81-78,283.35

Finding the Fourth Proportional to 120,724.50, 166,599.81 and 78,283.35

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Solution

The fourth proportional to 120,724.50, 166,599.81 and 78,283.35 is: 108,031.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,724.50 : 166,599.81 = 78,283.35 : x
  2. Step 2: Convert to fraction form
    120,724.50/166,599.81 = 78,283.35/x
  3. Step 3: Cross multiply
    120,724.50x = 166,599.81 × 78,283.35
  4. Step 4: Simplify right side
    120,724.50x = 13,041,991,236.16
  5. Step 5: Solve for x
    x = 13,041,991,236.16/120,724.50
  6. Step 6: Final answer
    x = 108,031.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.