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Finding the Fourth Proportional to 100,315.50, 138,399.90 and 57,263.93

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Solution

The fourth proportional to 100,315.50, 138,399.90 and 57,263.93 is: 79,003.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,315.50 : 138,399.90 = 57,263.93 : x
  2. Step 2: Convert to fraction form
    100,315.50/138,399.90 = 57,263.93/x
  3. Step 3: Cross multiply
    100,315.50x = 138,399.90 × 57,263.93
  4. Step 4: Simplify right side
    100,315.50x = 7,925,321,493.61
  5. Step 5: Solve for x
    x = 7,925,321,493.61/100,315.50
  6. Step 6: Final answer
    x = 79,003.96

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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.