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Finding the Fourth Proportional to 71,810.69, 99,098.64 and 39,987.07

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Solution

The fourth proportional to 71,810.69, 99,098.64 and 39,987.07 is: 55,182.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,810.69 : 99,098.64 = 39,987.07 : x
  2. Step 2: Convert to fraction form
    71,810.69/99,098.64 = 39,987.07/x
  3. Step 3: Cross multiply
    71,810.69x = 99,098.64 × 39,987.07
  4. Step 4: Simplify right side
    71,810.69x = 3,962,664,006.84
  5. Step 5: Solve for x
    x = 3,962,664,006.84/71,810.69
  6. Step 6: Final answer
    x = 55,182.09

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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.