Home / 431,138,006.40-646,707,009.60-124,440,124.80

Finding the Fourth Proportional to 431,138,006.40, 646,707,009.60 and 124,440,124.80

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Solution

The fourth proportional to 431,138,006.40, 646,707,009.60 and 124,440,124.80 is: 186,660,187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,138,006.40 : 646,707,009.60 = 124,440,124.80 : x
  2. Step 2: Convert to fraction form
    431,138,006.40/646,707,009.60 = 124,440,124.80/x
  3. Step 3: Cross multiply
    431,138,006.40x = 646,707,009.60 × 124,440,124.80
  4. Step 4: Simplify right side
    431,138,006.40x = 80,476,300,983,658,800
  5. Step 5: Solve for x
    x = 80,476,300,983,658,800/431,138,006.40
  6. Step 6: Final answer
    x = 186,660,187.20

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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.