Home / 281,123.72-421,742.02-103,631.64

Finding the Fourth Proportional to 281,123.72, 421,742.02 and 103,631.64

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Solution

The fourth proportional to 281,123.72, 421,742.02 and 103,631.64 is: 155,468.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,123.72 : 421,742.02 = 103,631.64 : x
  2. Step 2: Convert to fraction form
    281,123.72/421,742.02 = 103,631.64/x
  3. Step 3: Cross multiply
    281,123.72x = 421,742.02 × 103,631.64
  4. Step 4: Simplify right side
    281,123.72x = 43,705,817,189.51
  5. Step 5: Solve for x
    x = 43,705,817,189.51/281,123.72
  6. Step 6: Final answer
    x = 155,468.27

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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.