Home / 156,554.21-216,065.16-87,669.90

Finding the Fourth Proportional to 156,554.21, 216,065.16 and 87,669.90

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Solution

The fourth proportional to 156,554.21, 216,065.16 and 87,669.90 is: 120,995.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,554.21 : 216,065.16 = 87,669.90 : x
  2. Step 2: Convert to fraction form
    156,554.21/216,065.16 = 87,669.90/x
  3. Step 3: Cross multiply
    156,554.21x = 216,065.16 × 87,669.90
  4. Step 4: Simplify right side
    156,554.21x = 18,942,410,970.68
  5. Step 5: Solve for x
    x = 18,942,410,970.68/156,554.21
  6. Step 6: Final answer
    x = 120,995.86

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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.