Home / 142,440.66-196,571.07-78,782.76

Finding the Fourth Proportional to 142,440.66, 196,571.07 and 78,782.76

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Solution

The fourth proportional to 142,440.66, 196,571.07 and 78,782.76 is: 108,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,440.66 : 196,571.07 = 78,782.76 : x
  2. Step 2: Convert to fraction form
    142,440.66/196,571.07 = 78,782.76/x
  3. Step 3: Cross multiply
    142,440.66x = 196,571.07 × 78,782.76
  4. Step 4: Simplify right side
    142,440.66x = 15,486,411,430.75
  5. Step 5: Solve for x
    x = 15,486,411,430.75/142,440.66
  6. Step 6: Final answer
    x = 108,721.85

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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.