Home / 128,051,209.20-191,824,871.40-76,780,930.80

Finding the Fourth Proportional to 128,051,209.20, 191,824,871.40 and 76,780,930.80

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Solution

The fourth proportional to 128,051,209.20, 191,824,871.40 and 76,780,930.80 is: 115,020,328.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051,209.20 : 191,824,871.40 = 76,780,930.80 : x
  2. Step 2: Convert to fraction form
    128,051,209.20/191,824,871.40 = 76,780,930.80/x
  3. Step 3: Cross multiply
    128,051,209.20x = 191,824,871.40 × 76,780,930.80
  4. Step 4: Simplify right side
    128,051,209.20x = 14,728,492,176,682,300
  5. Step 5: Solve for x
    x = 14,728,492,176,682,300/128,051,209.20
  6. Step 6: Final answer
    x = 115,020,328.73

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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.