Home / 100,586.18-138,808.96-55,267.06

Finding the Fourth Proportional to 100,586.18, 138,808.96 and 55,267.06

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Solution

The fourth proportional to 100,586.18, 138,808.96 and 55,267.06 is: 76,268.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,586.18 : 138,808.96 = 55,267.06 : x
  2. Step 2: Convert to fraction form
    100,586.18/138,808.96 = 55,267.06/x
  3. Step 3: Cross multiply
    100,586.18x = 138,808.96 × 55,267.06
  4. Step 4: Simplify right side
    100,586.18x = 7,671,563,120.86
  5. Step 5: Solve for x
    x = 7,671,563,120.86/100,586.18
  6. Step 6: Final answer
    x = 76,268.56

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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.