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Finding the Fourth Proportional to 72,840.25, 109,266.45 and 20,250.19

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Solution

The fourth proportional to 72,840.25, 109,266.45 and 20,250.19 is: 30,376.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,840.25 : 109,266.45 = 20,250.19 : x
  2. Step 2: Convert to fraction form
    72,840.25/109,266.45 = 20,250.19/x
  3. Step 3: Cross multiply
    72,840.25x = 109,266.45 × 20,250.19
  4. Step 4: Simplify right side
    72,840.25x = 2,212,666,373.13
  5. Step 5: Solve for x
    x = 2,212,666,373.13/72,840.25
  6. Step 6: Final answer
    x = 30,376.97

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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.