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Finding the Fourth Proportional to 56,943.63, 85,415.31 and 15,390.63

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Solution

The fourth proportional to 56,943.63, 85,415.31 and 15,390.63 is: 23,085.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,943.63 : 85,415.31 = 15,390.63 : x
  2. Step 2: Convert to fraction form
    56,943.63/85,415.31 = 15,390.63/x
  3. Step 3: Cross multiply
    56,943.63x = 85,415.31 × 15,390.63
  4. Step 4: Simplify right side
    56,943.63x = 1,314,595,432.55
  5. Step 5: Solve for x
    x = 1,314,595,432.55/56,943.63
  6. Step 6: Final answer
    x = 23,085.91

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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.