Home / 138,805.08-191,551.07-75,142.88

Finding the Fourth Proportional to 138,805.08, 191,551.07 and 75,142.88

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Solution

The fourth proportional to 138,805.08, 191,551.07 and 75,142.88 is: 103,697.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,805.08 : 191,551.07 = 75,142.88 : x
  2. Step 2: Convert to fraction form
    138,805.08/191,551.07 = 75,142.88/x
  3. Step 3: Cross multiply
    138,805.08x = 191,551.07 × 75,142.88
  4. Step 4: Simplify right side
    138,805.08x = 14,393,699,066.88
  5. Step 5: Solve for x
    x = 14,393,699,066.88/138,805.08
  6. Step 6: Final answer
    x = 103,697.21

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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.