Home / 430,854,721.38-646,372,876.59-139,699,140.66

Finding the Fourth Proportional to 430,854,721.38, 646,372,876.59 and 139,699,140.66

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Solution

The fourth proportional to 430,854,721.38, 646,372,876.59 and 139,699,140.66 is: 209,578,149.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,854,721.38 : 646,372,876.59 = 139,699,140.66 : x
  2. Step 2: Convert to fraction form
    430,854,721.38/646,372,876.59 = 139,699,140.66/x
  3. Step 3: Cross multiply
    430,854,721.38x = 646,372,876.59 × 139,699,140.66
  4. Step 4: Simplify right side
    430,854,721.38x = 90,297,735,405,555,232
  5. Step 5: Solve for x
    x = 90,297,735,405,555,232/430,854,721.38
  6. Step 6: Final answer
    x = 209,578,149.95

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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.