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Finding the Fourth Proportional to 79,640.96, 109,903.65 and 55,758.92

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Solution

The fourth proportional to 79,640.96, 109,903.65 and 55,758.92 is: 76,946.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.96 : 109,903.65 = 55,758.92 : x
  2. Step 2: Convert to fraction form
    79,640.96/109,903.65 = 55,758.92/x
  3. Step 3: Cross multiply
    79,640.96x = 109,903.65 × 55,758.92
  4. Step 4: Simplify right side
    79,640.96x = 6,128,108,828.06
  5. Step 5: Solve for x
    x = 6,128,108,828.06/79,640.96
  6. Step 6: Final answer
    x = 76,946.70

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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.