Home / 287,981.45-431,922.94-77,570.18

Finding the Fourth Proportional to 287,981.45, 431,922.94 and 77,570.18

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Solution

The fourth proportional to 287,981.45, 431,922.94 and 77,570.18 is: 116,342.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,981.45 : 431,922.94 = 77,570.18 : x
  2. Step 2: Convert to fraction form
    287,981.45/431,922.94 = 77,570.18/x
  3. Step 3: Cross multiply
    287,981.45x = 431,922.94 × 77,570.18
  4. Step 4: Simplify right side
    287,981.45x = 33,504,340,201.93
  5. Step 5: Solve for x
    x = 33,504,340,201.93/287,981.45
  6. Step 6: Final answer
    x = 116,342.01

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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.