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Finding the Fourth Proportional to 72,339.71, 108,509.58 and 30,196.80

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Solution

The fourth proportional to 72,339.71, 108,509.58 and 30,196.80 is: 45,295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,339.71 : 108,509.58 = 30,196.80 : x
  2. Step 2: Convert to fraction form
    72,339.71/108,509.58 = 30,196.80/x
  3. Step 3: Cross multiply
    72,339.71x = 108,509.58 × 30,196.80
  4. Step 4: Simplify right side
    72,339.71x = 3,276,642,379.02
  5. Step 5: Solve for x
    x = 3,276,642,379.02/72,339.71
  6. Step 6: Final answer
    x = 45,295.21

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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.