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Finding the Fourth Proportional to 72,130.26, 108,217.26 and 42,485.49

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Solution

The fourth proportional to 72,130.26, 108,217.26 and 42,485.49 is: 63,741.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.26 : 108,217.26 = 42,485.49 : x
  2. Step 2: Convert to fraction form
    72,130.26/108,217.26 = 42,485.49/x
  3. Step 3: Cross multiply
    72,130.26x = 108,217.26 × 42,485.49
  4. Step 4: Simplify right side
    72,130.26x = 4,597,663,317.56
  5. Step 5: Solve for x
    x = 4,597,663,317.56/72,130.26
  6. Step 6: Final answer
    x = 63,741.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.