Home / 128,107.23-176,787.98-71,518.60

Finding the Fourth Proportional to 128,107.23, 176,787.98 and 71,518.60

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Solution

The fourth proportional to 128,107.23, 176,787.98 and 71,518.60 is: 98,695.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.23 : 176,787.98 = 71,518.60 : x
  2. Step 2: Convert to fraction form
    128,107.23/176,787.98 = 71,518.60/x
  3. Step 3: Cross multiply
    128,107.23x = 176,787.98 × 71,518.60
  4. Step 4: Simplify right side
    128,107.23x = 12,643,628,826.43
  5. Step 5: Solve for x
    x = 12,643,628,826.43/128,107.23
  6. Step 6: Final answer
    x = 98,695.67

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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.