Home / 278,091.36-417,241.28-128,403.36

Finding the Fourth Proportional to 278,091.36, 417,241.28 and 128,403.36

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Solution

The fourth proportional to 278,091.36, 417,241.28 and 128,403.36 is: 192,653.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,091.36 : 417,241.28 = 128,403.36 : x
  2. Step 2: Convert to fraction form
    278,091.36/417,241.28 = 128,403.36/x
  3. Step 3: Cross multiply
    278,091.36x = 417,241.28 × 128,403.36
  4. Step 4: Simplify right side
    278,091.36x = 53,575,182,282.70
  5. Step 5: Solve for x
    x = 53,575,182,282.70/278,091.36
  6. Step 6: Final answer
    x = 192,653.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.