Home / 81,389,140.20-122,083,710.30-70,429,645.80

Finding the Fourth Proportional to 81,389,140.20, 122,083,710.30 and 70,429,645.80

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Solution

The fourth proportional to 81,389,140.20, 122,083,710.30 and 70,429,645.80 is: 105,644,468.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389,140.20 : 122,083,710.30 = 70,429,645.80 : x
  2. Step 2: Convert to fraction form
    81,389,140.20/122,083,710.30 = 70,429,645.80/x
  3. Step 3: Cross multiply
    81,389,140.20x = 122,083,710.30 × 70,429,645.80
  4. Step 4: Simplify right side
    81,389,140.20x = 8,598,312,474,378,811
  5. Step 5: Solve for x
    x = 8,598,312,474,378,811/81,389,140.20
  6. Step 6: Final answer
    x = 105,644,468.70

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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.