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Finding the Fourth Proportional to 66,930.40, 100,280.40 and 56,562.40

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Solution

The fourth proportional to 66,930.40, 100,280.40 and 56,562.40 is: 84,746.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,930.40 : 100,280.40 = 56,562.40 : x
  2. Step 2: Convert to fraction form
    66,930.40/100,280.40 = 56,562.40/x
  3. Step 3: Cross multiply
    66,930.40x = 100,280.40 × 56,562.40
  4. Step 4: Simplify right side
    66,930.40x = 5,672,100,096.96
  5. Step 5: Solve for x
    x = 5,672,100,096.96/66,930.40
  6. Step 6: Final answer
    x = 84,746.25

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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.