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Finding the Fourth Proportional to 77,951.30, 107,517.58 and 76,784.90

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Solution

The fourth proportional to 77,951.30, 107,517.58 and 76,784.90 is: 105,908.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,951.30 : 107,517.58 = 76,784.90 : x
  2. Step 2: Convert to fraction form
    77,951.30/107,517.58 = 76,784.90/x
  3. Step 3: Cross multiply
    77,951.30x = 107,517.58 × 76,784.90
  4. Step 4: Simplify right side
    77,951.30x = 8,255,725,898.99
  5. Step 5: Solve for x
    x = 8,255,725,898.99/77,951.30
  6. Step 6: Final answer
    x = 105,908.77

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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.