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Finding the Fourth Proportional to 57,484.98, 79,328 and 31,990.36

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Solution

The fourth proportional to 57,484.98, 79,328 and 31,990.36 is: 44,145.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,484.98 : 79,328 = 31,990.36 : x
  2. Step 2: Convert to fraction form
    57,484.98/79,328 = 31,990.36/x
  3. Step 3: Cross multiply
    57,484.98x = 79,328 × 31,990.36
  4. Step 4: Simplify right side
    57,484.98x = 2,537,731,278.08
  5. Step 5: Solve for x
    x = 2,537,731,278.08/57,484.98
  6. Step 6: Final answer
    x = 44,145.99

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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.