Home / 100,013.12-138,017.76-55,301.12

Finding the Fourth Proportional to 100,013.12, 138,017.76 and 55,301.12

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Solution

The fourth proportional to 100,013.12, 138,017.76 and 55,301.12 is: 76,315.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,013.12 : 138,017.76 = 55,301.12 : x
  2. Step 2: Convert to fraction form
    100,013.12/138,017.76 = 55,301.12/x
  3. Step 3: Cross multiply
    100,013.12x = 138,017.76 × 55,301.12
  4. Step 4: Simplify right side
    100,013.12x = 7,632,536,707.89
  5. Step 5: Solve for x
    x = 7,632,536,707.89/100,013.12
  6. Step 6: Final answer
    x = 76,315.35

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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.