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Finding the Fourth Proportional to 56,487.40, 84,731.10 and 31,604.20

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Solution

The fourth proportional to 56,487.40, 84,731.10 and 31,604.20 is: 47,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,487.40 : 84,731.10 = 31,604.20 : x
  2. Step 2: Convert to fraction form
    56,487.40/84,731.10 = 31,604.20/x
  3. Step 3: Cross multiply
    56,487.40x = 84,731.10 × 31,604.20
  4. Step 4: Simplify right side
    56,487.40x = 2,677,858,630.62
  5. Step 5: Solve for x
    x = 2,677,858,630.62/56,487.40
  6. Step 6: Final answer
    x = 47,406.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.