Home / 287,623,612.20-431,612,565.30-123,939,784.20

Finding the Fourth Proportional to 287,623,612.20, 431,612,565.30 and 123,939,784.20

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Solution

The fourth proportional to 287,623,612.20, 431,612,565.30 and 123,939,784.20 is: 185,986,010.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,623,612.20 : 431,612,565.30 = 123,939,784.20 : x
  2. Step 2: Convert to fraction form
    287,623,612.20/431,612,565.30 = 123,939,784.20/x
  3. Step 3: Cross multiply
    287,623,612.20x = 431,612,565.30 × 123,939,784.20
  4. Step 4: Simplify right side
    287,623,612.20x = 53,493,968,201,290,408
  5. Step 5: Solve for x
    x = 53,493,968,201,290,408/287,623,612.20
  6. Step 6: Final answer
    x = 185,986,010.65

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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.