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Finding the Fourth Proportional to 141,805.70, 212,657.35 and 71,661.70

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Solution

The fourth proportional to 141,805.70, 212,657.35 and 71,661.70 is: 107,466.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,805.70 : 212,657.35 = 71,661.70 : x
  2. Step 2: Convert to fraction form
    141,805.70/212,657.35 = 71,661.70/x
  3. Step 3: Cross multiply
    141,805.70x = 212,657.35 × 71,661.70
  4. Step 4: Simplify right side
    141,805.70x = 15,239,387,218.50
  5. Step 5: Solve for x
    x = 15,239,387,218.50/141,805.70
  6. Step 6: Final answer
    x = 107,466.68

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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.