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Finding the Fourth Proportional to 51,322.71, 70,821.30 and 28,659.93

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Solution

The fourth proportional to 51,322.71, 70,821.30 and 28,659.93 is: 39,548.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,322.71 : 70,821.30 = 28,659.93 : x
  2. Step 2: Convert to fraction form
    51,322.71/70,821.30 = 28,659.93/x
  3. Step 3: Cross multiply
    51,322.71x = 70,821.30 × 28,659.93
  4. Step 4: Simplify right side
    51,322.71x = 2,029,733,500.51
  5. Step 5: Solve for x
    x = 2,029,733,500.51/51,322.71
  6. Step 6: Final answer
    x = 39,548.45

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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.