Home / 156,731.85-235,198.58-86,661.45

Finding the Fourth Proportional to 156,731.85, 235,198.58 and 86,661.45

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Solution

The fourth proportional to 156,731.85, 235,198.58 and 86,661.45 is: 130,047.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,731.85 : 235,198.58 = 86,661.45 : x
  2. Step 2: Convert to fraction form
    156,731.85/235,198.58 = 86,661.45/x
  3. Step 3: Cross multiply
    156,731.85x = 235,198.58 × 86,661.45
  4. Step 4: Simplify right side
    156,731.85x = 20,382,649,547.43
  5. Step 5: Solve for x
    x = 20,382,649,547.43/156,731.85
  6. Step 6: Final answer
    x = 130,047.91

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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.