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Finding the Fourth Proportional to 145,123.60, 217,416.60 and 82,608.40

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Solution

The fourth proportional to 145,123.60, 217,416.60 and 82,608.40 is: 123,759.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,123.60 : 217,416.60 = 82,608.40 : x
  2. Step 2: Convert to fraction form
    145,123.60/217,416.60 = 82,608.40/x
  3. Step 3: Cross multiply
    145,123.60x = 217,416.60 × 82,608.40
  4. Step 4: Simplify right side
    145,123.60x = 17,960,437,459.44
  5. Step 5: Solve for x
    x = 17,960,437,459.44/145,123.60
  6. Step 6: Final answer
    x = 123,759.59

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1.5x scale

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.