Home / 128,295,985.22-177,194,597.55-86,971,133.06

Finding the Fourth Proportional to 128,295,985.22, 177,194,597.55 and 86,971,133.06

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Solution

The fourth proportional to 128,295,985.22, 177,194,597.55 and 86,971,133.06 is: 120,119,229.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,295,985.22 : 177,194,597.55 = 86,971,133.06 : x
  2. Step 2: Convert to fraction form
    128,295,985.22/177,194,597.55 = 86,971,133.06/x
  3. Step 3: Cross multiply
    128,295,985.22x = 177,194,597.55 × 86,971,133.06
  4. Step 4: Simplify right side
    128,295,985.22x = 15,410,814,921,034,202
  5. Step 5: Solve for x
    x = 15,410,814,921,034,202/128,295,985.22
  6. Step 6: Final answer
    x = 120,119,229.72

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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.