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Finding the Fourth Proportional to 81,041.84, 121,599.12 and 51,451.76

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Solution

The fourth proportional to 81,041.84, 121,599.12 and 51,451.76 is: 77,200.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,041.84 : 121,599.12 = 51,451.76 : x
  2. Step 2: Convert to fraction form
    81,041.84/121,599.12 = 51,451.76/x
  3. Step 3: Cross multiply
    81,041.84x = 121,599.12 × 51,451.76
  4. Step 4: Simplify right side
    81,041.84x = 6,256,488,738.45
  5. Step 5: Solve for x
    x = 6,256,488,738.45/81,041.84
  6. Step 6: Final answer
    x = 77,200.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.