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Finding the Fourth Proportional to 84,003.57, 126,005.34 and 28,599.57

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Solution

The fourth proportional to 84,003.57, 126,005.34 and 28,599.57 is: 42,899.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,003.57 : 126,005.34 = 28,599.57 : x
  2. Step 2: Convert to fraction form
    84,003.57/126,005.34 = 28,599.57/x
  3. Step 3: Cross multiply
    84,003.57x = 126,005.34 × 28,599.57
  4. Step 4: Simplify right side
    84,003.57x = 3,603,698,541.70
  5. Step 5: Solve for x
    x = 3,603,698,541.70/84,003.57
  6. Step 6: Final answer
    x = 42,899.35

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1.5x scale

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.