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Finding the Fourth Proportional to 53,900,999.80, 80,854,998.90 and 28,391,831.80

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Solution

The fourth proportional to 53,900,999.80, 80,854,998.90 and 28,391,831.80 is: 42,589,590.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,900,999.80 : 80,854,998.90 = 28,391,831.80 : x
  2. Step 2: Convert to fraction form
    53,900,999.80/80,854,998.90 = 28,391,831.80/x
  3. Step 3: Cross multiply
    53,900,999.80x = 80,854,998.90 × 28,391,831.80
  4. Step 4: Simplify right side
    53,900,999.80x = 2,295,621,528,957,985
  5. Step 5: Solve for x
    x = 2,295,621,528,957,985/53,900,999.80
  6. Step 6: Final answer
    x = 42,589,590.87

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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.