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Finding the Fourth Proportional to 106,543.70, 159,815.55 and 66,886.10

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Solution

The fourth proportional to 106,543.70, 159,815.55 and 66,886.10 is: 100,329.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,543.70 : 159,815.55 = 66,886.10 : x
  2. Step 2: Convert to fraction form
    106,543.70/159,815.55 = 66,886.10/x
  3. Step 3: Cross multiply
    106,543.70x = 159,815.55 × 66,886.10
  4. Step 4: Simplify right side
    106,543.70x = 10,689,438,858.86
  5. Step 5: Solve for x
    x = 10,689,438,858.86/106,543.70
  6. Step 6: Final answer
    x = 100,329.15

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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.