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Finding the Fourth Proportional to 92,785.50, 128,077.20 and 55,059.75

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Solution

The fourth proportional to 92,785.50, 128,077.20 and 55,059.75 is: 76,002.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,785.50 : 128,077.20 = 55,059.75 : x
  2. Step 2: Convert to fraction form
    92,785.50/128,077.20 = 55,059.75/x
  3. Step 3: Cross multiply
    92,785.50x = 128,077.20 × 55,059.75
  4. Step 4: Simplify right side
    92,785.50x = 7,051,898,612.70
  5. Step 5: Solve for x
    x = 7,051,898,612.70/92,785.50
  6. Step 6: Final answer
    x = 76,002.16

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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.