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Finding the Fourth Proportional to 124,730.36, 172,127.84 and 67,369.70

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Solution

The fourth proportional to 124,730.36, 172,127.84 and 67,369.70 is: 92,970.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,730.36 : 172,127.84 = 67,369.70 : x
  2. Step 2: Convert to fraction form
    124,730.36/172,127.84 = 67,369.70/x
  3. Step 3: Cross multiply
    124,730.36x = 172,127.84 × 67,369.70
  4. Step 4: Simplify right side
    124,730.36x = 11,596,200,942.45
  5. Step 5: Solve for x
    x = 11,596,200,942.45/124,730.36
  6. Step 6: Final answer
    x = 92,970.16

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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.