Home / 81,218.36-112,019.28-69,906.80

Finding the Fourth Proportional to 81,218.36, 112,019.28 and 69,906.80

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Solution

The fourth proportional to 81,218.36, 112,019.28 and 69,906.80 is: 96,417.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,218.36 : 112,019.28 = 69,906.80 : x
  2. Step 2: Convert to fraction form
    81,218.36/112,019.28 = 69,906.80/x
  3. Step 3: Cross multiply
    81,218.36x = 112,019.28 × 69,906.80
  4. Step 4: Simplify right side
    81,218.36x = 7,830,909,403.10
  5. Step 5: Solve for x
    x = 7,830,909,403.10/81,218.36
  6. Step 6: Final answer
    x = 96,417.97

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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.