Home / 100,157.13-138,168.23-66,178.89

Finding the Fourth Proportional to 100,157.13, 138,168.23 and 66,178.89

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Solution

The fourth proportional to 100,157.13, 138,168.23 and 66,178.89 is: 91,294.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,157.13 : 138,168.23 = 66,178.89 : x
  2. Step 2: Convert to fraction form
    100,157.13/138,168.23 = 66,178.89/x
  3. Step 3: Cross multiply
    100,157.13x = 138,168.23 × 66,178.89
  4. Step 4: Simplify right side
    100,157.13x = 9,143,819,763.77
  5. Step 5: Solve for x
    x = 9,143,819,763.77/100,157.13
  6. Step 6: Final answer
    x = 91,294.75

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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.