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Finding the Fourth Proportional to 76,245.15, 105,218.94 and 42,254.22

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Solution

The fourth proportional to 76,245.15, 105,218.94 and 42,254.22 is: 58,311.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,245.15 : 105,218.94 = 42,254.22 : x
  2. Step 2: Convert to fraction form
    76,245.15/105,218.94 = 42,254.22/x
  3. Step 3: Cross multiply
    76,245.15x = 105,218.94 × 42,254.22
  4. Step 4: Simplify right side
    76,245.15x = 4,445,944,238.93
  5. Step 5: Solve for x
    x = 4,445,944,238.93/76,245.15
  6. Step 6: Final answer
    x = 58,311.17

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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.