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Finding the Fourth Proportional to 51,637.70, 71,263.73 and 28,978.90

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Solution

The fourth proportional to 51,637.70, 71,263.73 and 28,978.90 is: 39,992.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,637.70 : 71,263.73 = 28,978.90 : x
  2. Step 2: Convert to fraction form
    51,637.70/71,263.73 = 28,978.90/x
  3. Step 3: Cross multiply
    51,637.70x = 71,263.73 × 28,978.90
  4. Step 4: Simplify right side
    51,637.70x = 2,065,144,399.58
  5. Step 5: Solve for x
    x = 2,065,144,399.58/51,637.70
  6. Step 6: Final answer
    x = 39,992.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.