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Finding the Fourth Proportional to 86,838.48, 119,799 and 66,659.76

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Solution

The fourth proportional to 86,838.48, 119,799 and 66,659.76 is: 91,961.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,838.48 : 119,799 = 66,659.76 : x
  2. Step 2: Convert to fraction form
    86,838.48/119,799 = 66,659.76/x
  3. Step 3: Cross multiply
    86,838.48x = 119,799 × 66,659.76
  4. Step 4: Simplify right side
    86,838.48x = 7,985,772,588.24
  5. Step 5: Solve for x
    x = 7,985,772,588.24/86,838.48
  6. Step 6: Final answer
    x = 91,961.22

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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.