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Finding the Fourth Proportional to 86,999.29, 120,116.86 and 66,820.10

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Solution

The fourth proportional to 86,999.29, 120,116.86 and 66,820.10 is: 92,256.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.29 : 120,116.86 = 66,820.10 : x
  2. Step 2: Convert to fraction form
    86,999.29/120,116.86 = 66,820.10/x
  3. Step 3: Cross multiply
    86,999.29x = 120,116.86 × 66,820.10
  4. Step 4: Simplify right side
    86,999.29x = 8,026,219,829.25
  5. Step 5: Solve for x
    x = 8,026,219,829.25/86,999.29
  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.