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Finding the Fourth Proportional to 145,432.60, 217,880.10 and 82,917.40

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Solution

The fourth proportional to 145,432.60, 217,880.10 and 82,917.40 is: 124,222.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,432.60 : 217,880.10 = 82,917.40 : x
  2. Step 2: Convert to fraction form
    145,432.60/217,880.10 = 82,917.40/x
  3. Step 3: Cross multiply
    145,432.60x = 217,880.10 × 82,917.40
  4. Step 4: Simplify right side
    145,432.60x = 18,066,051,403.74
  5. Step 5: Solve for x
    x = 18,066,051,403.74/145,432.60
  6. Step 6: Final answer
    x = 124,222.85

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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.