Home / 99,879.36-137,832.48-57,436.80

Finding the Fourth Proportional to 99,879.36, 137,832.48 and 57,436.80

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Solution

The fourth proportional to 99,879.36, 137,832.48 and 57,436.80 is: 79,262.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,879.36 : 137,832.48 = 57,436.80 : x
  2. Step 2: Convert to fraction form
    99,879.36/137,832.48 = 57,436.80/x
  3. Step 3: Cross multiply
    99,879.36x = 137,832.48 × 57,436.80
  4. Step 4: Simplify right side
    99,879.36x = 7,916,656,587.26
  5. Step 5: Solve for x
    x = 7,916,656,587.26/99,879.36
  6. Step 6: Final answer
    x = 79,262.19

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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.