Home / 163,639.80-245,459.70-84,778.20

Finding the Fourth Proportional to 163,639.80, 245,459.70 and 84,778.20

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Solution

The fourth proportional to 163,639.80, 245,459.70 and 84,778.20 is: 127,167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,639.80 : 245,459.70 = 84,778.20 : x
  2. Step 2: Convert to fraction form
    163,639.80/245,459.70 = 84,778.20/x
  3. Step 3: Cross multiply
    163,639.80x = 245,459.70 × 84,778.20
  4. Step 4: Simplify right side
    163,639.80x = 20,809,631,538.54
  5. Step 5: Solve for x
    x = 20,809,631,538.54/163,639.80
  6. Step 6: Final answer
    x = 127,167.30

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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.