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Finding the Fourth Proportional to 100,715.34, 138,993.40 and 56,003.34

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Solution

The fourth proportional to 100,715.34, 138,993.40 and 56,003.34 is: 77,288.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,715.34 : 138,993.40 = 56,003.34 : x
  2. Step 2: Convert to fraction form
    100,715.34/138,993.40 = 56,003.34/x
  3. Step 3: Cross multiply
    100,715.34x = 138,993.40 × 56,003.34
  4. Step 4: Simplify right side
    100,715.34x = 7,784,094,637.96
  5. Step 5: Solve for x
    x = 7,784,094,637.96/100,715.34
  6. Step 6: Final answer
    x = 77,288.07

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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.