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Finding the Fourth Proportional to 71,955.90, 99,296.96 and 40,130.19

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Solution

The fourth proportional to 71,955.90, 99,296.96 and 40,130.19 is: 55,378.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,955.90 : 99,296.96 = 40,130.19 : x
  2. Step 2: Convert to fraction form
    71,955.90/99,296.96 = 40,130.19/x
  3. Step 3: Cross multiply
    71,955.90x = 99,296.96 × 40,130.19
  4. Step 4: Simplify right side
    71,955.90x = 3,984,805,670.57
  5. Step 5: Solve for x
    x = 3,984,805,670.57/71,955.90
  6. Step 6: Final answer
    x = 55,378.44

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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.