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Finding the Fourth Proportional to 143,886.60, 215,829.90 and 80,641.80

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Solution

The fourth proportional to 143,886.60, 215,829.90 and 80,641.80 is: 120,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,886.60 : 215,829.90 = 80,641.80 : x
  2. Step 2: Convert to fraction form
    143,886.60/215,829.90 = 80,641.80/x
  3. Step 3: Cross multiply
    143,886.60x = 215,829.90 × 80,641.80
  4. Step 4: Simplify right side
    143,886.60x = 17,404,911,629.82
  5. Step 5: Solve for x
    x = 17,404,911,629.82/143,886.60
  6. Step 6: Final answer
    x = 120,962.70

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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.