Home / 56,078.16-84,105.36-21,020.40

Finding the Fourth Proportional to 56,078.16, 84,105.36 and 21,020.40

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Solution

The fourth proportional to 56,078.16, 84,105.36 and 21,020.40 is: 31,526.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,078.16 : 84,105.36 = 21,020.40 : x
  2. Step 2: Convert to fraction form
    56,078.16/84,105.36 = 21,020.40/x
  3. Step 3: Cross multiply
    56,078.16x = 84,105.36 × 21,020.40
  4. Step 4: Simplify right side
    56,078.16x = 1,767,928,309.34
  5. Step 5: Solve for x
    x = 1,767,928,309.34/56,078.16
  6. Step 6: Final answer
    x = 31,526.15

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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.