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Finding the Fourth Proportional to 127,800.50, 176,394.74 and 79,438.91

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Solution

The fourth proportional to 127,800.50, 176,394.74 and 79,438.91 is: 109,644.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,800.50 : 176,394.74 = 79,438.91 : x
  2. Step 2: Convert to fraction form
    127,800.50/176,394.74 = 79,438.91/x
  3. Step 3: Cross multiply
    127,800.50x = 176,394.74 × 79,438.91
  4. Step 4: Simplify right side
    127,800.50x = 14,012,604,596.17
  5. Step 5: Solve for x
    x = 14,012,604,596.17/127,800.50
  6. Step 6: Final answer
    x = 109,644.37

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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.