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Finding the Fourth Proportional to 137,411.55, 205,953.30 and 70,817.40

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Solution

The fourth proportional to 137,411.55, 205,953.30 and 70,817.40 is: 106,141.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,411.55 : 205,953.30 = 70,817.40 : x
  2. Step 2: Convert to fraction form
    137,411.55/205,953.30 = 70,817.40/x
  3. Step 3: Cross multiply
    137,411.55x = 205,953.30 × 70,817.40
  4. Step 4: Simplify right side
    137,411.55x = 14,585,077,227.42
  5. Step 5: Solve for x
    x = 14,585,077,227.42/137,411.55
  6. Step 6: Final answer
    x = 106,141.57

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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.