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Finding the Fourth Proportional to 72,700.62, 100,325.54 and 40,435.08

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Solution

The fourth proportional to 72,700.62, 100,325.54 and 40,435.08 is: 55,799.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,700.62 : 100,325.54 = 40,435.08 : x
  2. Step 2: Convert to fraction form
    72,700.62/100,325.54 = 40,435.08/x
  3. Step 3: Cross multiply
    72,700.62x = 100,325.54 × 40,435.08
  4. Step 4: Simplify right side
    72,700.62x = 4,056,671,297.69
  5. Step 5: Solve for x
    x = 4,056,671,297.69/72,700.62
  6. Step 6: Final answer
    x = 55,799.68

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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.