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Finding the Fourth Proportional to 71,720.70, 98,906.63 and 45,887.42

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Solution

The fourth proportional to 71,720.70, 98,906.63 and 45,887.42 is: 63,281.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,720.70 : 98,906.63 = 45,887.42 : x
  2. Step 2: Convert to fraction form
    71,720.70/98,906.63 = 45,887.42/x
  3. Step 3: Cross multiply
    71,720.70x = 98,906.63 × 45,887.42
  4. Step 4: Simplify right side
    71,720.70x = 4,538,570,127.91
  5. Step 5: Solve for x
    x = 4,538,570,127.91/71,720.70
  6. Step 6: Final answer
    x = 63,281.18

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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.