Home / 210,605.12-290,634.36-115,111.76

Finding the Fourth Proportional to 210,605.12, 290,634.36 and 115,111.76

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Solution

The fourth proportional to 210,605.12, 290,634.36 and 115,111.76 is: 158,853.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,605.12 : 290,634.36 = 115,111.76 : x
  2. Step 2: Convert to fraction form
    210,605.12/290,634.36 = 115,111.76/x
  3. Step 3: Cross multiply
    210,605.12x = 290,634.36 × 115,111.76
  4. Step 4: Simplify right side
    210,605.12x = 33,455,432,696.07
  5. Step 5: Solve for x
    x = 33,455,432,696.07/210,605.12
  6. Step 6: Final answer
    x = 158,853.84

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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.