Home / 86,859.12-129,992.82-72,835

Finding the Fourth Proportional to 86,859.12, 129,992.82 and 72,835

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Solution

The fourth proportional to 86,859.12, 129,992.82 and 72,835 is: 109,004.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,859.12 : 129,992.82 = 72,835 : x
  2. Step 2: Convert to fraction form
    86,859.12/129,992.82 = 72,835/x
  3. Step 3: Cross multiply
    86,859.12x = 129,992.82 × 72,835
  4. Step 4: Simplify right side
    86,859.12x = 9,468,027,044.70
  5. Step 5: Solve for x
    x = 9,468,027,044.70/86,859.12
  6. Step 6: Final answer
    x = 109,004.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.