Home / 210,004.20-315,006.30-99,412.20

Finding the Fourth Proportional to 210,004.20, 315,006.30 and 99,412.20

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Solution

The fourth proportional to 210,004.20, 315,006.30 and 99,412.20 is: 149,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,004.20 : 315,006.30 = 99,412.20 : x
  2. Step 2: Convert to fraction form
    210,004.20/315,006.30 = 99,412.20/x
  3. Step 3: Cross multiply
    210,004.20x = 315,006.30 × 99,412.20
  4. Step 4: Simplify right side
    210,004.20x = 31,315,469,296.86
  5. Step 5: Solve for x
    x = 31,315,469,296.86/210,004.20
  6. Step 6: Final answer
    x = 149,118.30

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1.5x scale

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.