Home / 281,331.02-421,686.93-138,965.51

Finding the Fourth Proportional to 281,331.02, 421,686.93 and 138,965.51

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Solution

The fourth proportional to 281,331.02, 421,686.93 and 138,965.51 is: 208,295.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,331.02 : 421,686.93 = 138,965.51 : x
  2. Step 2: Convert to fraction form
    281,331.02/421,686.93 = 138,965.51/x
  3. Step 3: Cross multiply
    281,331.02x = 421,686.93 × 138,965.51
  4. Step 4: Simplify right side
    281,331.02x = 58,599,939,287.78
  5. Step 5: Solve for x
    x = 58,599,939,287.78/281,331.02
  6. Step 6: Final answer
    x = 208,295.34

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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.