Home / 90,639.94-125,116.81-77,841.74

Finding the Fourth Proportional to 90,639.94, 125,116.81 and 77,841.74

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Solution

The fourth proportional to 90,639.94, 125,116.81 and 77,841.74 is: 107,450.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,639.94 : 125,116.81 = 77,841.74 : x
  2. Step 2: Convert to fraction form
    90,639.94/125,116.81 = 77,841.74/x
  3. Step 3: Cross multiply
    90,639.94x = 125,116.81 × 77,841.74
  4. Step 4: Simplify right side
    90,639.94x = 9,739,310,193.65
  5. Step 5: Solve for x
    x = 9,739,310,193.65/90,639.94
  6. Step 6: Final answer
    x = 107,450.54

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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.