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Finding the Fourth Proportional to 56,978.87, 85,510.98 and 21,475.22

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Solution

The fourth proportional to 56,978.87, 85,510.98 and 21,475.22 is: 32,228.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,978.87 : 85,510.98 = 21,475.22 : x
  2. Step 2: Convert to fraction form
    56,978.87/85,510.98 = 21,475.22/x
  3. Step 3: Cross multiply
    56,978.87x = 85,510.98 × 21,475.22
  4. Step 4: Simplify right side
    56,978.87x = 1,836,366,680.36
  5. Step 5: Solve for x
    x = 1,836,366,680.36/56,978.87
  6. Step 6: Final answer
    x = 32,228.91

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