Home / 78,085.56-117,133.48-31,332.36

Finding the Fourth Proportional to 78,085.56, 117,133.48 and 31,332.36

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Solution

The fourth proportional to 78,085.56, 117,133.48 and 31,332.36 is: 47,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,085.56 : 117,133.48 = 31,332.36 : x
  2. Step 2: Convert to fraction form
    78,085.56/117,133.48 = 31,332.36/x
  3. Step 3: Cross multiply
    78,085.56x = 117,133.48 × 31,332.36
  4. Step 4: Simplify right side
    78,085.56x = 3,670,068,363.41
  5. Step 5: Solve for x
    x = 3,670,068,363.41/78,085.56
  6. Step 6: Final answer
    x = 47,000.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.