Home / 56,643.09-78,165.81-31,149.43

Finding the Fourth Proportional to 56,643.09, 78,165.81 and 31,149.43

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Solution

The fourth proportional to 56,643.09, 78,165.81 and 31,149.43 is: 42,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,643.09 : 78,165.81 = 31,149.43 : x
  2. Step 2: Convert to fraction form
    56,643.09/78,165.81 = 31,149.43/x
  3. Step 3: Cross multiply
    56,643.09x = 78,165.81 × 31,149.43
  4. Step 4: Simplify right side
    56,643.09x = 2,434,819,880.41
  5. Step 5: Solve for x
    x = 2,434,819,880.41/56,643.09
  6. Step 6: Final answer
    x = 42,985.30

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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.