Home / 105,216.12-145,191.78-57,459.78

Finding the Fourth Proportional to 105,216.12, 145,191.78 and 57,459.78

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Solution

The fourth proportional to 105,216.12, 145,191.78 and 57,459.78 is: 79,290.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,216.12 : 145,191.78 = 57,459.78 : x
  2. Step 2: Convert to fraction form
    105,216.12/145,191.78 = 57,459.78/x
  3. Step 3: Cross multiply
    105,216.12x = 145,191.78 × 57,459.78
  4. Step 4: Simplify right side
    105,216.12x = 8,342,687,736.61
  5. Step 5: Solve for x
    x = 8,342,687,736.61/105,216.12
  6. Step 6: Final answer
    x = 79,290.97

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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.