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Finding the Fourth Proportional to 100,652.94, 138,902.81 and 55,332.83

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Solution

The fourth proportional to 100,652.94, 138,902.81 and 55,332.83 is: 76,360.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,652.94 : 138,902.81 = 55,332.83 : x
  2. Step 2: Convert to fraction form
    100,652.94/138,902.81 = 55,332.83/x
  3. Step 3: Cross multiply
    100,652.94x = 138,902.81 × 55,332.83
  4. Step 4: Simplify right side
    100,652.94x = 7,685,885,503.09
  5. Step 5: Solve for x
    x = 7,685,885,503.09/100,652.94
  6. Step 6: Final answer
    x = 76,360.27

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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.