Home / 100,816.90-139,140.57-57,813.22

Finding the Fourth Proportional to 100,816.90, 139,140.57 and 57,813.22

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Solution

The fourth proportional to 100,816.90, 139,140.57 and 57,813.22 is: 79,789.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,816.90 : 139,140.57 = 57,813.22 : x
  2. Step 2: Convert to fraction form
    100,816.90/139,140.57 = 57,813.22/x
  3. Step 3: Cross multiply
    100,816.90x = 139,140.57 × 57,813.22
  4. Step 4: Simplify right side
    100,816.90x = 8,044,164,384.34
  5. Step 5: Solve for x
    x = 8,044,164,384.34/100,816.90
  6. Step 6: Final answer
    x = 79,789.84

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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.