Home / 57,459.78-79,344.36-42,378.59

Finding the Fourth Proportional to 57,459.78, 79,344.36 and 42,378.59

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Solution

The fourth proportional to 57,459.78, 79,344.36 and 42,378.59 is: 58,519.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,459.78 : 79,344.36 = 42,378.59 : x
  2. Step 2: Convert to fraction form
    57,459.78/79,344.36 = 42,378.59/x
  3. Step 3: Cross multiply
    57,459.78x = 79,344.36 × 42,378.59
  4. Step 4: Simplify right side
    57,459.78x = 3,362,502,299.61
  5. Step 5: Solve for x
    x = 3,362,502,299.61/57,459.78
  6. Step 6: Final answer
    x = 58,519.23

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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.