Home / 102,879.18-142,021.80-77,395.23

Finding the Fourth Proportional to 102,879.18, 142,021.80 and 77,395.23

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Solution

The fourth proportional to 102,879.18, 142,021.80 and 77,395.23 is: 106,841.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,879.18 : 142,021.80 = 77,395.23 : x
  2. Step 2: Convert to fraction form
    102,879.18/142,021.80 = 77,395.23/x
  3. Step 3: Cross multiply
    102,879.18x = 142,021.80 × 77,395.23
  4. Step 4: Simplify right side
    102,879.18x = 10,991,809,876.01
  5. Step 5: Solve for x
    x = 10,991,809,876.01/102,879.18
  6. Step 6: Final answer
    x = 106,841.93

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1.5x scale

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.