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Finding the Fourth Proportional to 172,333.61, 258,500.51 and 78,773.75

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Solution

The fourth proportional to 172,333.61, 258,500.51 and 78,773.75 is: 118,160.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,333.61 : 258,500.51 = 78,773.75 : x
  2. Step 2: Convert to fraction form
    172,333.61/258,500.51 = 78,773.75/x
  3. Step 3: Cross multiply
    172,333.61x = 258,500.51 × 78,773.75
  4. Step 4: Simplify right side
    172,333.61x = 20,363,054,549.61
  5. Step 5: Solve for x
    x = 20,363,054,549.61/172,333.61
  6. Step 6: Final answer
    x = 118,160.67

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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.