Home / 100,066.62-138,108.87-57,617.34

Finding the Fourth Proportional to 100,066.62, 138,108.87 and 57,617.34

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Solution

The fourth proportional to 100,066.62, 138,108.87 and 57,617.34 is: 79,521.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,066.62 : 138,108.87 = 57,617.34 : x
  2. Step 2: Convert to fraction form
    100,066.62/138,108.87 = 57,617.34/x
  3. Step 3: Cross multiply
    100,066.62x = 138,108.87 × 57,617.34
  4. Step 4: Simplify right side
    100,066.62x = 7,957,465,719.81
  5. Step 5: Solve for x
    x = 7,957,465,719.81/100,066.62
  6. Step 6: Final answer
    x = 79,521.68

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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.