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Finding the Fourth Proportional to 72,751.36, 100,384.32 and 40,917.76

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Solution

The fourth proportional to 72,751.36, 100,384.32 and 40,917.76 is: 56,459.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,751.36 : 100,384.32 = 40,917.76 : x
  2. Step 2: Convert to fraction form
    72,751.36/100,384.32 = 40,917.76/x
  3. Step 3: Cross multiply
    72,751.36x = 100,384.32 × 40,917.76
  4. Step 4: Simplify right side
    72,751.36x = 4,107,501,513.52
  5. Step 5: Solve for x
    x = 4,107,501,513.52/72,751.36
  6. Step 6: Final answer
    x = 56,459.45

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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.