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Finding the Fourth Proportional to 55,907.80, 83,861.70 and 51,971.20

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Solution

The fourth proportional to 55,907.80, 83,861.70 and 51,971.20 is: 77,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,907.80 : 83,861.70 = 51,971.20 : x
  2. Step 2: Convert to fraction form
    55,907.80/83,861.70 = 51,971.20/x
  3. Step 3: Cross multiply
    55,907.80x = 83,861.70 × 51,971.20
  4. Step 4: Simplify right side
    55,907.80x = 4,358,393,183.04
  5. Step 5: Solve for x
    x = 4,358,393,183.04/55,907.80
  6. Step 6: Final answer
    x = 77,956.80

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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.