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Finding the Fourth Proportional to 127,819.69, 191,599.65 and 52,980.55

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Solution

The fourth proportional to 127,819.69, 191,599.65 and 52,980.55 is: 79,416.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,819.69 : 191,599.65 = 52,980.55 : x
  2. Step 2: Convert to fraction form
    127,819.69/191,599.65 = 52,980.55/x
  3. Step 3: Cross multiply
    127,819.69x = 191,599.65 × 52,980.55
  4. Step 4: Simplify right side
    127,819.69x = 10,151,054,836.81
  5. Step 5: Solve for x
    x = 10,151,054,836.81/127,819.69
  6. Step 6: Final answer
    x = 79,416.99

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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.