Home / 81,621.45-112,636.98-45,811.35

Finding the Fourth Proportional to 81,621.45, 112,636.98 and 45,811.35

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Solution

The fourth proportional to 81,621.45, 112,636.98 and 45,811.35 is: 63,219.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,621.45 : 112,636.98 = 45,811.35 : x
  2. Step 2: Convert to fraction form
    81,621.45/112,636.98 = 45,811.35/x
  3. Step 3: Cross multiply
    81,621.45x = 112,636.98 × 45,811.35
  4. Step 4: Simplify right side
    81,621.45x = 5,160,052,113.72
  5. Step 5: Solve for x
    x = 5,160,052,113.72/81,621.45
  6. Step 6: Final answer
    x = 63,219.31

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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.