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Finding the Fourth Proportional to 127,813.30, 191,719.95 and 80,574.10

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Solution

The fourth proportional to 127,813.30, 191,719.95 and 80,574.10 is: 120,861.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,813.30 : 191,719.95 = 80,574.10 : x
  2. Step 2: Convert to fraction form
    127,813.30/191,719.95 = 80,574.10/x
  3. Step 3: Cross multiply
    127,813.30x = 191,719.95 × 80,574.10
  4. Step 4: Simplify right side
    127,813.30x = 15,447,662,423.30
  5. Step 5: Solve for x
    x = 15,447,662,423.30/127,813.30
  6. Step 6: Final answer
    x = 120,861.15

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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.