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Finding the Fourth Proportional to 131,004, 180,785.52 and 71,388

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Solution

The fourth proportional to 131,004, 180,785.52 and 71,388 is: 98,515.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,004 : 180,785.52 = 71,388 : x
  2. Step 2: Convert to fraction form
    131,004/180,785.52 = 71,388/x
  3. Step 3: Cross multiply
    131,004x = 180,785.52 × 71,388
  4. Step 4: Simplify right side
    131,004x = 12,905,916,701.76
  5. Step 5: Solve for x
    x = 12,905,916,701.76/131,004
  6. Step 6: Final answer
    x = 98,515.44

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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.