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Finding the Fourth Proportional to 51,351.60, 70,858.16 and 28,687.76

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Solution

The fourth proportional to 51,351.60, 70,858.16 and 28,687.76 is: 39,585.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,351.60 : 70,858.16 = 28,687.76 : x
  2. Step 2: Convert to fraction form
    51,351.60/70,858.16 = 28,687.76/x
  3. Step 3: Cross multiply
    51,351.60x = 70,858.16 × 28,687.76
  4. Step 4: Simplify right side
    51,351.60x = 2,032,761,888.12
  5. Step 5: Solve for x
    x = 2,032,761,888.12/51,351.60
  6. Step 6: Final answer
    x = 39,585.17

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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.