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Finding the Fourth Proportional to 56,680.32, 84,978.90 and 28,586.46

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Solution

The fourth proportional to 56,680.32, 84,978.90 and 28,586.46 is: 42,858.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,680.32 : 84,978.90 = 28,586.46 : x
  2. Step 2: Convert to fraction form
    56,680.32/84,978.90 = 28,586.46/x
  3. Step 3: Cross multiply
    56,680.32x = 84,978.90 × 28,586.46
  4. Step 4: Simplify right side
    56,680.32x = 2,429,245,925.69
  5. Step 5: Solve for x
    x = 2,429,245,925.69/56,680.32
  6. Step 6: Final answer
    x = 42,858.72

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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.