Home / 120,087.09-165,696.64-72,343.06

Finding the Fourth Proportional to 120,087.09, 165,696.64 and 72,343.06

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Solution

The fourth proportional to 120,087.09, 165,696.64 and 72,343.06 is: 99,819.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,087.09 : 165,696.64 = 72,343.06 : x
  2. Step 2: Convert to fraction form
    120,087.09/165,696.64 = 72,343.06/x
  3. Step 3: Cross multiply
    120,087.09x = 165,696.64 × 72,343.06
  4. Step 4: Simplify right side
    120,087.09x = 11,987,001,374.22
  5. Step 5: Solve for x
    x = 11,987,001,374.22/120,087.09
  6. Step 6: Final answer
    x = 99,819.23

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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.