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Finding the Fourth Proportional to 123,920.94, 170,970.50 and 72,226.24

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Solution

The fourth proportional to 123,920.94, 170,970.50 and 72,226.24 is: 99,648.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,920.94 : 170,970.50 = 72,226.24 : x
  2. Step 2: Convert to fraction form
    123,920.94/170,970.50 = 72,226.24/x
  3. Step 3: Cross multiply
    123,920.94x = 170,970.50 × 72,226.24
  4. Step 4: Simplify right side
    123,920.94x = 12,348,556,365.92
  5. Step 5: Solve for x
    x = 12,348,556,365.92/123,920.94
  6. Step 6: Final answer
    x = 99,648.67

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1.5x scale

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.