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Finding the Fourth Proportional to 72,807.45, 100,476.30 and 40,977.46

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Solution

The fourth proportional to 72,807.45, 100,476.30 and 40,977.46 is: 56,550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,807.45 : 100,476.30 = 40,977.46 : x
  2. Step 2: Convert to fraction form
    72,807.45/100,476.30 = 40,977.46/x
  3. Step 3: Cross multiply
    72,807.45x = 100,476.30 × 40,977.46
  4. Step 4: Simplify right side
    72,807.45x = 4,117,263,564.20
  5. Step 5: Solve for x
    x = 4,117,263,564.20/72,807.45
  6. Step 6: Final answer
    x = 56,550.03

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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.