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Finding the Fourth Proportional to 130,245.76, 179,678.82 and 76,529.80

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Solution

The fourth proportional to 130,245.76, 179,678.82 and 76,529.80 is: 105,575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,245.76 : 179,678.82 = 76,529.80 : x
  2. Step 2: Convert to fraction form
    130,245.76/179,678.82 = 76,529.80/x
  3. Step 3: Cross multiply
    130,245.76x = 179,678.82 × 76,529.80
  4. Step 4: Simplify right side
    130,245.76x = 13,750,784,158.84
  5. Step 5: Solve for x
    x = 13,750,784,158.84/130,245.76
  6. Step 6: Final answer
    x = 105,575.68

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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.