Home / 142,303.12-196,378.49-78,640.93

Finding the Fourth Proportional to 142,303.12, 196,378.49 and 78,640.93

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Solution

The fourth proportional to 142,303.12, 196,378.49 and 78,640.93 is: 108,524.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,303.12 : 196,378.49 = 78,640.93 : x
  2. Step 2: Convert to fraction form
    142,303.12/196,378.49 = 78,640.93/x
  3. Step 3: Cross multiply
    142,303.12x = 196,378.49 × 78,640.93
  4. Step 4: Simplify right side
    142,303.12x = 15,443,387,527.67
  5. Step 5: Solve for x
    x = 15,443,387,527.67/142,303.12
  6. Step 6: Final answer
    x = 108,524.59

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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.