Home / 210,639.48-290,515.15-159,128.34

Finding the Fourth Proportional to 210,639.48, 290,515.15 and 159,128.34

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Solution

The fourth proportional to 210,639.48, 290,515.15 and 159,128.34 is: 219,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,639.48 : 290,515.15 = 159,128.34 : x
  2. Step 2: Convert to fraction form
    210,639.48/290,515.15 = 159,128.34/x
  3. Step 3: Cross multiply
    210,639.48x = 290,515.15 × 159,128.34
  4. Step 4: Simplify right side
    210,639.48x = 46,229,193,564.35
  5. Step 5: Solve for x
    x = 46,229,193,564.35/210,639.48
  6. Step 6: Final answer
    x = 219,470.70

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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.