Home / 257,706.21-386,143.77-139,433.25

Finding the Fourth Proportional to 257,706.21, 386,143.77 and 139,433.25

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Solution

The fourth proportional to 257,706.21, 386,143.77 and 139,433.25 is: 208,925.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,706.21 : 386,143.77 = 139,433.25 : x
  2. Step 2: Convert to fraction form
    257,706.21/386,143.77 = 139,433.25/x
  3. Step 3: Cross multiply
    257,706.21x = 386,143.77 × 139,433.25
  4. Step 4: Simplify right side
    257,706.21x = 53,841,280,818.35
  5. Step 5: Solve for x
    x = 53,841,280,818.35/257,706.21
  6. Step 6: Final answer
    x = 208,925.04

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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.