Home / 105,171.34-145,135.35-57,424.54

Finding the Fourth Proportional to 105,171.34, 145,135.35 and 57,424.54

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Solution

The fourth proportional to 105,171.34, 145,135.35 and 57,424.54 is: 79,245.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,171.34 : 145,135.35 = 57,424.54 : x
  2. Step 2: Convert to fraction form
    105,171.34/145,135.35 = 57,424.54/x
  3. Step 3: Cross multiply
    105,171.34x = 145,135.35 × 57,424.54
  4. Step 4: Simplify right side
    105,171.34x = 8,334,330,711.49
  5. Step 5: Solve for x
    x = 8,334,330,711.49/105,171.34
  6. Step 6: Final answer
    x = 79,245.27

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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.