Home / 142,107.53-196,107.93-78,444.86

Finding the Fourth Proportional to 142,107.53, 196,107.93 and 78,444.86

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Solution

The fourth proportional to 142,107.53, 196,107.93 and 78,444.86 is: 108,253.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,107.53 : 196,107.93 = 78,444.86 : x
  2. Step 2: Convert to fraction form
    142,107.53/196,107.93 = 78,444.86/x
  3. Step 3: Cross multiply
    142,107.53x = 196,107.93 × 78,444.86
  4. Step 4: Simplify right side
    142,107.53x = 15,383,658,133.20
  5. Step 5: Solve for x
    x = 15,383,658,133.20/142,107.53
  6. Step 6: Final answer
    x = 108,253.65

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1.5x scale

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.