Home / 156,554.72-216,065.85-87,670.40

Finding the Fourth Proportional to 156,554.72, 216,065.85 and 87,670.40

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Solution

The fourth proportional to 156,554.72, 216,065.85 and 87,670.40 is: 120,996.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,554.72 : 216,065.85 = 87,670.40 : x
  2. Step 2: Convert to fraction form
    156,554.72/216,065.85 = 87,670.40/x
  3. Step 3: Cross multiply
    156,554.72x = 216,065.85 × 87,670.40
  4. Step 4: Simplify right side
    156,554.72x = 18,942,579,495.84
  5. Step 5: Solve for x
    x = 18,942,579,495.84/156,554.72
  6. Step 6: Final answer
    x = 120,996.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.