Home / 54,139.10-81,208.65-51,806.30

Finding the Fourth Proportional to 54,139.10, 81,208.65 and 51,806.30

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Solution

The fourth proportional to 54,139.10, 81,208.65 and 51,806.30 is: 77,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,139.10 : 81,208.65 = 51,806.30 : x
  2. Step 2: Convert to fraction form
    54,139.10/81,208.65 = 51,806.30/x
  3. Step 3: Cross multiply
    54,139.10x = 81,208.65 × 51,806.30
  4. Step 4: Simplify right side
    54,139.10x = 4,207,119,684.50
  5. Step 5: Solve for x
    x = 4,207,119,684.50/54,139.10
  6. Step 6: Final answer
    x = 77,709.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.