Home / 287,623,615.20-431,612,569.80-123,939,787.20

Finding the Fourth Proportional to 287,623,615.20, 431,612,569.80 and 123,939,787.20

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Solution

The fourth proportional to 287,623,615.20, 431,612,569.80 and 123,939,787.20 is: 185,986,015.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,623,615.20 : 431,612,569.80 = 123,939,787.20 : x
  2. Step 2: Convert to fraction form
    287,623,615.20/431,612,569.80 = 123,939,787.20/x
  3. Step 3: Cross multiply
    287,623,615.20x = 431,612,569.80 × 123,939,787.20
  4. Step 4: Simplify right side
    287,623,615.20x = 53,493,970,053,857,152
  5. Step 5: Solve for x
    x = 53,493,970,053,857,152/287,623,615.20
  6. Step 6: Final answer
    x = 185,986,015.15

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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.