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Finding the Fourth Proportional to 56,611.98, 77,989.50 and 39,584.36

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Solution

The fourth proportional to 56,611.98, 77,989.50 and 39,584.36 is: 54,531.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,611.98 : 77,989.50 = 39,584.36 : x
  2. Step 2: Convert to fraction form
    56,611.98/77,989.50 = 39,584.36/x
  3. Step 3: Cross multiply
    56,611.98x = 77,989.50 × 39,584.36
  4. Step 4: Simplify right side
    56,611.98x = 3,087,164,054.27
  5. Step 5: Solve for x
    x = 3,087,164,054.27/56,611.98
  6. Step 6: Final answer
    x = 54,531.99

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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.