Home / 287,424,021.20-431,136,031.80-105,647,579.60

Finding the Fourth Proportional to 287,424,021.20, 431,136,031.80 and 105,647,579.60

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Solution

The fourth proportional to 287,424,021.20, 431,136,031.80 and 105,647,579.60 is: 158,471,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,424,021.20 : 431,136,031.80 = 105,647,579.60 : x
  2. Step 2: Convert to fraction form
    287,424,021.20/431,136,031.80 = 105,647,579.60/x
  3. Step 3: Cross multiply
    287,424,021.20x = 431,136,031.80 × 105,647,579.60
  4. Step 4: Simplify right side
    287,424,021.20x = 45,548,478,238,018,632
  5. Step 5: Solve for x
    x = 45,548,478,238,018,632/287,424,021.20
  6. Step 6: Final answer
    x = 158,471,369.40

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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.