Home / 66,479.20-99,718.80-40,235.20

Finding the Fourth Proportional to 66,479.20, 99,718.80 and 40,235.20

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Solution

The fourth proportional to 66,479.20, 99,718.80 and 40,235.20 is: 60,352.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.20 : 99,718.80 = 40,235.20 : x
  2. Step 2: Convert to fraction form
    66,479.20/99,718.80 = 40,235.20/x
  3. Step 3: Cross multiply
    66,479.20x = 99,718.80 × 40,235.20
  4. Step 4: Simplify right side
    66,479.20x = 4,012,205,861.76
  5. Step 5: Solve for x
    x = 4,012,205,861.76/66,479.20
  6. Step 6: Final answer
    x = 60,352.80

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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.