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Finding the Fourth Proportional to 120,342.66, 180,688.95 and 88,849.86

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Solution

The fourth proportional to 120,342.66, 180,688.95 and 88,849.86 is: 133,403.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,342.66 : 180,688.95 = 88,849.86 : x
  2. Step 2: Convert to fraction form
    120,342.66/180,688.95 = 88,849.86/x
  3. Step 3: Cross multiply
    120,342.66x = 180,688.95 × 88,849.86
  4. Step 4: Simplify right side
    120,342.66x = 16,054,187,911.05
  5. Step 5: Solve for x
    x = 16,054,187,911.05/120,342.66
  6. Step 6: Final answer
    x = 133,403.96

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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.