Home / 278,449.09-417,606.66-128,545.45

Finding the Fourth Proportional to 278,449.09, 417,606.66 and 128,545.45

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Solution

The fourth proportional to 278,449.09, 417,606.66 and 128,545.45 is: 192,787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,449.09 : 417,606.66 = 128,545.45 : x
  2. Step 2: Convert to fraction form
    278,449.09/417,606.66 = 128,545.45/x
  3. Step 3: Cross multiply
    278,449.09x = 417,606.66 × 128,545.45
  4. Step 4: Simplify right side
    278,449.09x = 53,681,434,988.68
  5. Step 5: Solve for x
    x = 53,681,434,988.68/278,449.09
  6. Step 6: Final answer
    x = 192,787.25

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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.