Home / 100,117.54-138,192.95-57,704.30

Finding the Fourth Proportional to 100,117.54, 138,192.95 and 57,704.30

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Solution

The fourth proportional to 100,117.54, 138,192.95 and 57,704.30 is: 79,649.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,117.54 : 138,192.95 = 57,704.30 : x
  2. Step 2: Convert to fraction form
    100,117.54/138,192.95 = 57,704.30/x
  3. Step 3: Cross multiply
    100,117.54x = 138,192.95 × 57,704.30
  4. Step 4: Simplify right side
    100,117.54x = 7,974,327,444.69
  5. Step 5: Solve for x
    x = 7,974,327,444.69/100,117.54
  6. Step 6: Final answer
    x = 79,649.65

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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.