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Finding the Fourth Proportional to 71,730.96, 98,996.08 and 39,907.68

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Solution

The fourth proportional to 71,730.96, 98,996.08 and 39,907.68 is: 55,076.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,730.96 : 98,996.08 = 39,907.68 : x
  2. Step 2: Convert to fraction form
    71,730.96/98,996.08 = 39,907.68/x
  3. Step 3: Cross multiply
    71,730.96x = 98,996.08 × 39,907.68
  4. Step 4: Simplify right side
    71,730.96x = 3,950,703,881.89
  5. Step 5: Solve for x
    x = 3,950,703,881.89/71,730.96
  6. Step 6: Final answer
    x = 55,076.69

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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.