Home / 210,640.72-290,656.12-135,291.28

Finding the Fourth Proportional to 210,640.72, 290,656.12 and 135,291.28

Calculator

Solution

The fourth proportional to 210,640.72, 290,656.12 and 135,291.28 is: 186,683.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,640.72 : 290,656.12 = 135,291.28 : x
  2. Step 2: Convert to fraction form
    210,640.72/290,656.12 = 135,291.28/x
  3. Step 3: Cross multiply
    210,640.72x = 290,656.12 × 135,291.28
  4. Step 4: Simplify right side
    210,640.72x = 39,323,238,514.63
  5. Step 5: Solve for x
    x = 39,323,238,514.63/210,640.72
  6. Step 6: Final answer
    x = 186,683.94

Related Problems

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.