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Finding the Fourth Proportional to 514,143.70, 771,215.55 and 135,039.40

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Solution

The fourth proportional to 514,143.70, 771,215.55 and 135,039.40 is: 202,559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,143.70 : 771,215.55 = 135,039.40 : x
  2. Step 2: Convert to fraction form
    514,143.70/771,215.55 = 135,039.40/x
  3. Step 3: Cross multiply
    514,143.70x = 771,215.55 × 135,039.40
  4. Step 4: Simplify right side
    514,143.70x = 104,144,485,142.67
  5. Step 5: Solve for x
    x = 104,144,485,142.67/514,143.70
  6. Step 6: Final answer
    x = 202,559.10

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Similar ratio
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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.