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Finding the Fourth Proportional to 120,511, 180,829.54 and 87,503.72

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Solution

The fourth proportional to 120,511, 180,829.54 and 87,503.72 is: 131,301.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,511 : 180,829.54 = 87,503.72 : x
  2. Step 2: Convert to fraction form
    120,511/180,829.54 = 87,503.72/x
  3. Step 3: Cross multiply
    120,511x = 180,829.54 × 87,503.72
  4. Step 4: Simplify right side
    120,511x = 15,823,257,435.89
  5. Step 5: Solve for x
    x = 15,823,257,435.89/120,511
  6. Step 6: Final answer
    x = 131,301.35

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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.