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Finding the Fourth Proportional to 72,763.29, 100,412.30 and 40,932.18

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Solution

The fourth proportional to 72,763.29, 100,412.30 and 40,932.18 is: 56,485.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,763.29 : 100,412.30 = 40,932.18 : x
  2. Step 2: Convert to fraction form
    72,763.29/100,412.30 = 40,932.18/x
  3. Step 3: Cross multiply
    72,763.29x = 100,412.30 × 40,932.18
  4. Step 4: Simplify right side
    72,763.29x = 4,110,094,133.15
  5. Step 5: Solve for x
    x = 4,110,094,133.15/72,763.29
  6. Step 6: Final answer
    x = 56,485.82

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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.