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Finding the Fourth Proportional to 72,718.60, 100,349.94 and 47,567.56

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Solution

The fourth proportional to 72,718.60, 100,349.94 and 47,567.56 is: 65,642.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,718.60 : 100,349.94 = 47,567.56 : x
  2. Step 2: Convert to fraction form
    72,718.60/100,349.94 = 47,567.56/x
  3. Step 3: Cross multiply
    72,718.60x = 100,349.94 × 47,567.56
  4. Step 4: Simplify right side
    72,718.60x = 4,773,401,791.95
  5. Step 5: Solve for x
    x = 4,773,401,791.95/72,718.60
  6. Step 6: Final answer
    x = 65,642.10

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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.