Home / 78,370.45-117,555.81-19,206.31

Finding the Fourth Proportional to 78,370.45, 117,555.81 and 19,206.31

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Solution

The fourth proportional to 78,370.45, 117,555.81 and 19,206.31 is: 28,809.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,370.45 : 117,555.81 = 19,206.31 : x
  2. Step 2: Convert to fraction form
    78,370.45/117,555.81 = 19,206.31/x
  3. Step 3: Cross multiply
    78,370.45x = 117,555.81 × 19,206.31
  4. Step 4: Simplify right side
    78,370.45x = 2,257,813,329.16
  5. Step 5: Solve for x
    x = 2,257,813,329.16/78,370.45
  6. Step 6: Final answer
    x = 28,809.50

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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.