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Finding the Fourth Proportional to 68,885,869.86, 103,328,804.76 and 28,496,353.86

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Solution

The fourth proportional to 68,885,869.86, 103,328,804.76 and 28,496,353.86 is: 42,744,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,885,869.86 : 103,328,804.76 = 28,496,353.86 : x
  2. Step 2: Convert to fraction form
    68,885,869.86/103,328,804.76 = 28,496,353.86/x
  3. Step 3: Cross multiply
    68,885,869.86x = 103,328,804.76 × 28,496,353.86
  4. Step 4: Simplify right side
    68,885,869.86x = 2,944,494,184,371,812.50
  5. Step 5: Solve for x
    x = 2,944,494,184,371,812.50/68,885,869.86
  6. Step 6: Final answer
    x = 42,744,530.78

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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.