Home / 78,500.30-117,718.76-30,443.61

Finding the Fourth Proportional to 78,500.30, 117,718.76 and 30,443.61

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Solution

The fourth proportional to 78,500.30, 117,718.76 and 30,443.61 is: 45,653.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500.30 : 117,718.76 = 30,443.61 : x
  2. Step 2: Convert to fraction form
    78,500.30/117,718.76 = 30,443.61/x
  3. Step 3: Cross multiply
    78,500.30x = 117,718.76 × 30,443.61
  4. Step 4: Simplify right side
    78,500.30x = 3,583,783,866.91
  5. Step 5: Solve for x
    x = 3,583,783,866.91/78,500.30
  6. Step 6: Final answer
    x = 45,653.12

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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.