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Finding the Fourth Proportional to 103,640.10, 155,460.15 and 91,392.90

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Solution

The fourth proportional to 103,640.10, 155,460.15 and 91,392.90 is: 137,089.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.10 : 155,460.15 = 91,392.90 : x
  2. Step 2: Convert to fraction form
    103,640.10/155,460.15 = 91,392.90/x
  3. Step 3: Cross multiply
    103,640.10x = 155,460.15 × 91,392.90
  4. Step 4: Simplify right side
    103,640.10x = 14,207,953,942.94
  5. Step 5: Solve for x
    x = 14,207,953,942.94/103,640.10
  6. Step 6: Final answer
    x = 137,089.35

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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.