Home / 123,778.50-170,814.63-67,189.86

Finding the Fourth Proportional to 123,778.50, 170,814.63 and 67,189.86

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Solution

The fourth proportional to 123,778.50, 170,814.63 and 67,189.86 is: 92,722.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,778.50 : 170,814.63 = 67,189.86 : x
  2. Step 2: Convert to fraction form
    123,778.50/170,814.63 = 67,189.86/x
  3. Step 3: Cross multiply
    123,778.50x = 170,814.63 × 67,189.86
  4. Step 4: Simplify right side
    123,778.50x = 11,477,011,075.65
  5. Step 5: Solve for x
    x = 11,477,011,075.65/123,778.50
  6. Step 6: Final answer
    x = 92,722.17

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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.