Home / 128,555,577-177,417,637.29-72,810,913.68

Finding the Fourth Proportional to 128,555,577, 177,417,637.29 and 72,810,913.68

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Solution

The fourth proportional to 128,555,577, 177,417,637.29 and 72,810,913.68 is: 100,485,257.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,577 : 177,417,637.29 = 72,810,913.68 : x
  2. Step 2: Convert to fraction form
    128,555,577/177,417,637.29 = 72,810,913.68/x
  3. Step 3: Cross multiply
    128,555,577x = 177,417,637.29 × 72,810,913.68
  4. Step 4: Simplify right side
    128,555,577x = 12,917,940,274,031,740
  5. Step 5: Solve for x
    x = 12,917,940,274,031,740/128,555,577
  6. Step 6: Final answer
    x = 100,485,257.63

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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.