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Finding the Fourth Proportional to 51,416.70, 77,015.70 and 42,668.70

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Solution

The fourth proportional to 51,416.70, 77,015.70 and 42,668.70 is: 63,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,416.70 : 77,015.70 = 42,668.70 : x
  2. Step 2: Convert to fraction form
    51,416.70/77,015.70 = 42,668.70/x
  3. Step 3: Cross multiply
    51,416.70x = 77,015.70 × 42,668.70
  4. Step 4: Simplify right side
    51,416.70x = 3,286,159,798.59
  5. Step 5: Solve for x
    x = 3,286,159,798.59/51,416.70
  6. Step 6: Final answer
    x = 63,912.30

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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.