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Finding the Fourth Proportional to 71,804.22, 99,085.05 and 39,972.30

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Solution

The fourth proportional to 71,804.22, 99,085.05 and 39,972.30 is: 55,159.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,804.22 : 99,085.05 = 39,972.30 : x
  2. Step 2: Convert to fraction form
    71,804.22/99,085.05 = 39,972.30/x
  3. Step 3: Cross multiply
    71,804.22x = 99,085.05 × 39,972.30
  4. Step 4: Simplify right side
    71,804.22x = 3,960,657,344.12
  5. Step 5: Solve for x
    x = 3,960,657,344.12/71,804.22
  6. Step 6: Final answer
    x = 55,159.12

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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.