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Finding the Fourth Proportional to 77,431.34, 116,152.79 and 39,968.03

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Solution

The fourth proportional to 77,431.34, 116,152.79 and 39,968.03 is: 59,955.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,431.34 : 116,152.79 = 39,968.03 : x
  2. Step 2: Convert to fraction form
    77,431.34/116,152.79 = 39,968.03/x
  3. Step 3: Cross multiply
    77,431.34x = 116,152.79 × 39,968.03
  4. Step 4: Simplify right side
    77,431.34x = 4,642,398,285.85
  5. Step 5: Solve for x
    x = 4,642,398,285.85/77,431.34
  6. Step 6: Final answer
    x = 59,955.03

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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.