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Finding the Fourth Proportional to 72,990.96, 100,754.84 and 56,826.24

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Solution

The fourth proportional to 72,990.96, 100,754.84 and 56,826.24 is: 78,441.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990.96 : 100,754.84 = 56,826.24 : x
  2. Step 2: Convert to fraction form
    72,990.96/100,754.84 = 56,826.24/x
  3. Step 3: Cross multiply
    72,990.96x = 100,754.84 × 56,826.24
  4. Step 4: Simplify right side
    72,990.96x = 5,725,518,434.87
  5. Step 5: Solve for x
    x = 5,725,518,434.87/72,990.96
  6. Step 6: Final answer
    x = 78,441.47

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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.