Home / 100,785.94-139,055.74-64,996.50

Finding the Fourth Proportional to 100,785.94, 139,055.74 and 64,996.50

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Solution

The fourth proportional to 100,785.94, 139,055.74 and 64,996.50 is: 89,676.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,785.94 : 139,055.74 = 64,996.50 : x
  2. Step 2: Convert to fraction form
    100,785.94/139,055.74 = 64,996.50/x
  3. Step 3: Cross multiply
    100,785.94x = 139,055.74 × 64,996.50
  4. Step 4: Simplify right side
    100,785.94x = 9,038,136,404.91
  5. Step 5: Solve for x
    x = 9,038,136,404.91/100,785.94
  6. Step 6: Final answer
    x = 89,676.56

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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.