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Finding the Fourth Proportional to 56,611.31, 78,124.92 and 31,118.99

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Solution

The fourth proportional to 56,611.31, 78,124.92 and 31,118.99 is: 42,944.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,611.31 : 78,124.92 = 31,118.99 : x
  2. Step 2: Convert to fraction form
    56,611.31/78,124.92 = 31,118.99/x
  3. Step 3: Cross multiply
    56,611.31x = 78,124.92 × 31,118.99
  4. Step 4: Simplify right side
    56,611.31x = 2,431,168,604.23
  5. Step 5: Solve for x
    x = 2,431,168,604.23/56,611.31
  6. Step 6: Final answer
    x = 42,944.93

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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.