Home / 128,051,303.20-191,825,012.40-76,781,024.80

Finding the Fourth Proportional to 128,051,303.20, 191,825,012.40 and 76,781,024.80

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Solution

The fourth proportional to 128,051,303.20, 191,825,012.40 and 76,781,024.80 is: 115,020,469.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051,303.20 : 191,825,012.40 = 76,781,024.80 : x
  2. Step 2: Convert to fraction form
    128,051,303.20/191,825,012.40 = 76,781,024.80/x
  3. Step 3: Cross multiply
    128,051,303.20x = 191,825,012.40 × 76,781,024.80
  4. Step 4: Simplify right side
    128,051,303.20x = 14,728,521,034,344,708
  5. Step 5: Solve for x
    x = 14,728,521,034,344,708/128,051,303.20
  6. Step 6: Final answer
    x = 115,020,469.66

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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.