Home / 56,639.40-78,164.08-31,144.46

Finding the Fourth Proportional to 56,639.40, 78,164.08 and 31,144.46

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Solution

The fourth proportional to 56,639.40, 78,164.08 and 31,144.46 is: 42,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,639.40 : 78,164.08 = 31,144.46 : x
  2. Step 2: Convert to fraction form
    56,639.40/78,164.08 = 31,144.46/x
  3. Step 3: Cross multiply
    56,639.40x = 78,164.08 × 31,144.46
  4. Step 4: Simplify right side
    56,639.40x = 2,434,378,063.00
  5. Step 5: Solve for x
    x = 2,434,378,063.00/56,639.40
  6. Step 6: Final answer
    x = 42,980.29

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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.