Home / 51,129.60-70,557.12-28,769.28

Finding the Fourth Proportional to 51,129.60, 70,557.12 and 28,769.28

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Solution

The fourth proportional to 51,129.60, 70,557.12 and 28,769.28 is: 39,700.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,129.60 : 70,557.12 = 28,769.28 : x
  2. Step 2: Convert to fraction form
    51,129.60/70,557.12 = 28,769.28/x
  3. Step 3: Cross multiply
    51,129.60x = 70,557.12 × 28,769.28
  4. Step 4: Simplify right side
    51,129.60x = 2,029,877,541.27
  5. Step 5: Solve for x
    x = 2,029,877,541.27/51,129.60
  6. Step 6: Final answer
    x = 39,700.63

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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.