Home / 287,991.21-431,993.04-88,307.18

Finding the Fourth Proportional to 287,991.21, 431,993.04 and 88,307.18

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Solution

The fourth proportional to 287,991.21, 431,993.04 and 88,307.18 is: 132,462.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,991.21 : 431,993.04 = 88,307.18 : x
  2. Step 2: Convert to fraction form
    287,991.21/431,993.04 = 88,307.18/x
  3. Step 3: Cross multiply
    287,991.21x = 431,993.04 × 88,307.18
  4. Step 4: Simplify right side
    287,991.21x = 38,148,084,540.53
  5. Step 5: Solve for x
    x = 38,148,084,540.53/287,991.21
  6. Step 6: Final answer
    x = 132,462.67

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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.