Home / 78,213.12-116,313.47-75,721.99

Finding the Fourth Proportional to 78,213.12, 116,313.47 and 75,721.99

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Solution

The fourth proportional to 78,213.12, 116,313.47 and 75,721.99 is: 112,608.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,213.12 : 116,313.47 = 75,721.99 : x
  2. Step 2: Convert to fraction form
    78,213.12/116,313.47 = 75,721.99/x
  3. Step 3: Cross multiply
    78,213.12x = 116,313.47 × 75,721.99
  4. Step 4: Simplify right side
    78,213.12x = 8,807,487,244.86
  5. Step 5: Solve for x
    x = 8,807,487,244.86/78,213.12
  6. Step 6: Final answer
    x = 112,608.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.