Home / 81,020.13-121,549.64-25,616.13

Finding the Fourth Proportional to 81,020.13, 121,549.64 and 25,616.13

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Solution

The fourth proportional to 81,020.13, 121,549.64 and 25,616.13 is: 38,430.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,020.13 : 121,549.64 = 25,616.13 : x
  2. Step 2: Convert to fraction form
    81,020.13/121,549.64 = 25,616.13/x
  3. Step 3: Cross multiply
    81,020.13x = 121,549.64 × 25,616.13
  4. Step 4: Simplify right side
    81,020.13x = 3,113,631,379.69
  5. Step 5: Solve for x
    x = 3,113,631,379.69/81,020.13
  6. Step 6: Final answer
    x = 38,430.34

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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.