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Finding the Fourth Proportional to 71,178.77, 98,222.85 and 39,345.77

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Solution

The fourth proportional to 71,178.77, 98,222.85 and 39,345.77 is: 54,295.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,178.77 : 98,222.85 = 39,345.77 : x
  2. Step 2: Convert to fraction form
    71,178.77/98,222.85 = 39,345.77/x
  3. Step 3: Cross multiply
    71,178.77x = 98,222.85 × 39,345.77
  4. Step 4: Simplify right side
    71,178.77x = 3,864,653,173.73
  5. Step 5: Solve for x
    x = 3,864,653,173.73/71,178.77
  6. Step 6: Final answer
    x = 54,295.03

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1.5x scale

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.