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Finding the Fourth Proportional to 72,364.80, 108,547.20 and 48,745.20

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Solution

The fourth proportional to 72,364.80, 108,547.20 and 48,745.20 is: 73,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,364.80 : 108,547.20 = 48,745.20 : x
  2. Step 2: Convert to fraction form
    72,364.80/108,547.20 = 48,745.20/x
  3. Step 3: Cross multiply
    72,364.80x = 108,547.20 × 48,745.20
  4. Step 4: Simplify right side
    72,364.80x = 5,291,154,973.44
  5. Step 5: Solve for x
    x = 5,291,154,973.44/72,364.80
  6. Step 6: Final answer
    x = 73,117.80

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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.