Home / 51,720.30-71,365.38-30,503.76

Finding the Fourth Proportional to 51,720.30, 71,365.38 and 30,503.76

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Solution

The fourth proportional to 51,720.30, 71,365.38 and 30,503.76 is: 42,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,720.30 : 71,365.38 = 30,503.76 : x
  2. Step 2: Convert to fraction form
    51,720.30/71,365.38 = 30,503.76/x
  3. Step 3: Cross multiply
    51,720.30x = 71,365.38 × 30,503.76
  4. Step 4: Simplify right side
    51,720.30x = 2,176,912,423.83
  5. Step 5: Solve for x
    x = 2,176,912,423.83/51,720.30
  6. Step 6: Final answer
    x = 42,090.10

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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.