Home / 86,999.28-120,116.88-66,820.08

Finding the Fourth Proportional to 86,999.28, 120,116.88 and 66,820.08

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Solution

The fourth proportional to 86,999.28, 120,116.88 and 66,820.08 is: 92,256.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.28 : 120,116.88 = 66,820.08 : x
  2. Step 2: Convert to fraction form
    86,999.28/120,116.88 = 66,820.08/x
  3. Step 3: Cross multiply
    86,999.28x = 120,116.88 × 66,820.08
  4. Step 4: Simplify right side
    86,999.28x = 8,026,219,530.95
  5. Step 5: Solve for x
    x = 8,026,219,530.95/86,999.28
  6. Step 6: Final answer
    x = 92,256.16

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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.