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Finding the Fourth Proportional to 71,357.80, 107,036.70 and 66,983.80

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Solution

The fourth proportional to 71,357.80, 107,036.70 and 66,983.80 is: 100,475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,357.80 : 107,036.70 = 66,983.80 : x
  2. Step 2: Convert to fraction form
    71,357.80/107,036.70 = 66,983.80/x
  3. Step 3: Cross multiply
    71,357.80x = 107,036.70 × 66,983.80
  4. Step 4: Simplify right side
    71,357.80x = 7,169,724,905.46
  5. Step 5: Solve for x
    x = 7,169,724,905.46/71,357.80
  6. Step 6: Final answer
    x = 100,475.70

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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.