Home / 56,628.94-78,148-31,135.74

Finding the Fourth Proportional to 56,628.94, 78,148 and 31,135.74

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Solution

The fourth proportional to 56,628.94, 78,148 and 31,135.74 is: 42,967.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,628.94 : 78,148 = 31,135.74 : x
  2. Step 2: Convert to fraction form
    56,628.94/78,148 = 31,135.74/x
  3. Step 3: Cross multiply
    56,628.94x = 78,148 × 31,135.74
  4. Step 4: Simplify right side
    56,628.94x = 2,433,195,809.52
  5. Step 5: Solve for x
    x = 2,433,195,809.52/56,628.94
  6. Step 6: Final answer
    x = 42,967.36

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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.