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Finding the Fourth Proportional to 72,813.42, 100,482.30 and 40,982.31

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Solution

The fourth proportional to 72,813.42, 100,482.30 and 40,982.31 is: 56,555.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,813.42 : 100,482.30 = 40,982.31 : x
  2. Step 2: Convert to fraction form
    72,813.42/100,482.30 = 40,982.31/x
  3. Step 3: Cross multiply
    72,813.42x = 100,482.30 × 40,982.31
  4. Step 4: Simplify right side
    72,813.42x = 4,117,996,768.11
  5. Step 5: Solve for x
    x = 4,117,996,768.11/72,813.42
  6. Step 6: Final answer
    x = 56,555.46

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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.