Home / 287,428,538.80-431,142,808.20-103,284,232.30

Finding the Fourth Proportional to 287,428,538.80, 431,142,808.20 and 103,284,232.30

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Solution

The fourth proportional to 287,428,538.80, 431,142,808.20 and 103,284,232.30 is: 154,926,348.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,428,538.80 : 431,142,808.20 = 103,284,232.30 : x
  2. Step 2: Convert to fraction form
    287,428,538.80/431,142,808.20 = 103,284,232.30/x
  3. Step 3: Cross multiply
    287,428,538.80x = 431,142,808.20 × 103,284,232.30
  4. Step 4: Simplify right side
    287,428,538.80x = 44,530,253,956,603,144
  5. Step 5: Solve for x
    x = 44,530,253,956,603,144/287,428,538.80
  6. Step 6: Final answer
    x = 154,926,348.45

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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.