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Finding the Fourth Proportional to 100,367.86, 138,468.13 and 57,918.19

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Solution

The fourth proportional to 100,367.86, 138,468.13 and 57,918.19 is: 79,904.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,367.86 : 138,468.13 = 57,918.19 : x
  2. Step 2: Convert to fraction form
    100,367.86/138,468.13 = 57,918.19/x
  3. Step 3: Cross multiply
    100,367.86x = 138,468.13 × 57,918.19
  4. Step 4: Simplify right side
    100,367.86x = 8,019,823,462.28
  5. Step 5: Solve for x
    x = 8,019,823,462.28/100,367.86
  6. Step 6: Final answer
    x = 79,904.30

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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.