Home / 105,512.99-145,608.36-57,770.78

Finding the Fourth Proportional to 105,512.99, 145,608.36 and 57,770.78

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Solution

The fourth proportional to 105,512.99, 145,608.36 and 57,770.78 is: 79,723.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,512.99 : 145,608.36 = 57,770.78 : x
  2. Step 2: Convert to fraction form
    105,512.99/145,608.36 = 57,770.78/x
  3. Step 3: Cross multiply
    105,512.99x = 145,608.36 × 57,770.78
  4. Step 4: Simplify right side
    105,512.99x = 8,411,908,679.10
  5. Step 5: Solve for x
    x = 8,411,908,679.10/105,512.99
  6. Step 6: Final answer
    x = 79,723.91

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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.