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Finding the Fourth Proportional to 72,660.40, 100,274.32 and 40,829.22

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Solution

The fourth proportional to 72,660.40, 100,274.32 and 40,829.22 is: 56,345.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,660.40 : 100,274.32 = 40,829.22 : x
  2. Step 2: Convert to fraction form
    72,660.40/100,274.32 = 40,829.22/x
  3. Step 3: Cross multiply
    72,660.40x = 100,274.32 × 40,829.22
  4. Step 4: Simplify right side
    72,660.40x = 4,094,122,271.63
  5. Step 5: Solve for x
    x = 4,094,122,271.63/72,660.40
  6. Step 6: Final answer
    x = 56,345.99

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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.