Home / 78,110.79-117,116.51-66,268.64

Finding the Fourth Proportional to 78,110.79, 117,116.51 and 66,268.64

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Solution

The fourth proportional to 78,110.79, 117,116.51 and 66,268.64 is: 99,360.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,110.79 : 117,116.51 = 66,268.64 : x
  2. Step 2: Convert to fraction form
    78,110.79/117,116.51 = 66,268.64/x
  3. Step 3: Cross multiply
    78,110.79x = 117,116.51 × 66,268.64
  4. Step 4: Simplify right side
    78,110.79x = 7,761,151,712.13
  5. Step 5: Solve for x
    x = 7,761,151,712.13/78,110.79
  6. Step 6: Final answer
    x = 99,360.82

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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.