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Finding the Fourth Proportional to 145,135.70, 217,415.55 and 127,817.30

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Solution

The fourth proportional to 145,135.70, 217,415.55 and 127,817.30 is: 191,472.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,135.70 : 217,415.55 = 127,817.30 : x
  2. Step 2: Convert to fraction form
    145,135.70/217,415.55 = 127,817.30/x
  3. Step 3: Cross multiply
    145,135.70x = 217,415.55 × 127,817.30
  4. Step 4: Simplify right side
    145,135.70x = 27,789,468,579.02
  5. Step 5: Solve for x
    x = 27,789,468,579.02/145,135.70
  6. Step 6: Final answer
    x = 191,472.32

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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.