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Finding the Fourth Proportional to 84,553.16, 126,841.40 and 28,409.32

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Solution

The fourth proportional to 84,553.16, 126,841.40 and 28,409.32 is: 42,617.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,553.16 : 126,841.40 = 28,409.32 : x
  2. Step 2: Convert to fraction form
    84,553.16/126,841.40 = 28,409.32/x
  3. Step 3: Cross multiply
    84,553.16x = 126,841.40 × 28,409.32
  4. Step 4: Simplify right side
    84,553.16x = 3,603,477,675.77
  5. Step 5: Solve for x
    x = 3,603,477,675.77/84,553.16
  6. Step 6: Final answer
    x = 42,617.90

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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.