Home / 121,931,742.72-168,265,967.36-66,177,163.16

Finding the Fourth Proportional to 121,931,742.72, 168,265,967.36 and 66,177,163.16

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Solution

The fourth proportional to 121,931,742.72, 168,265,967.36 and 66,177,163.16 is: 91,324,573.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,931,742.72 : 168,265,967.36 = 66,177,163.16 : x
  2. Step 2: Convert to fraction form
    121,931,742.72/168,265,967.36 = 66,177,163.16/x
  3. Step 3: Cross multiply
    121,931,742.72x = 168,265,967.36 × 66,177,163.16
  4. Step 4: Simplify right side
    121,931,742.72x = 11,135,364,376,257,954
  5. Step 5: Solve for x
    x = 11,135,364,376,257,954/121,931,742.72
  6. Step 6: Final answer
    x = 91,324,573.31

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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.