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Finding the Fourth Proportional to 124,756.76, 172,183.76 and 79,454.28

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Solution

The fourth proportional to 124,756.76, 172,183.76 and 79,454.28 is: 109,659.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,756.76 : 172,183.76 = 79,454.28 : x
  2. Step 2: Convert to fraction form
    124,756.76/172,183.76 = 79,454.28/x
  3. Step 3: Cross multiply
    124,756.76x = 172,183.76 × 79,454.28
  4. Step 4: Simplify right side
    124,756.76x = 13,680,736,678.49
  5. Step 5: Solve for x
    x = 13,680,736,678.49/124,756.76
  6. Step 6: Final answer
    x = 109,659.28

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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.