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Finding the Fourth Proportional to 72,620.40, 100,225.56 and 40,789.30

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Solution

The fourth proportional to 72,620.40, 100,225.56 and 40,789.30 is: 56,294.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,620.40 : 100,225.56 = 40,789.30 : x
  2. Step 2: Convert to fraction form
    72,620.40/100,225.56 = 40,789.30/x
  3. Step 3: Cross multiply
    72,620.40x = 100,225.56 × 40,789.30
  4. Step 4: Simplify right side
    72,620.40x = 4,088,130,230.56
  5. Step 5: Solve for x
    x = 4,088,130,230.56/72,620.40
  6. Step 6: Final answer
    x = 56,294.52

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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.