Home / 128,555,528.12-177,417,570.02-72,810,865.06

Finding the Fourth Proportional to 128,555,528.12, 177,417,570.02 and 72,810,865.06

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Solution

The fourth proportional to 128,555,528.12, 177,417,570.02 and 72,810,865.06 is: 100,485,190.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,528.12 : 177,417,570.02 = 72,810,865.06 : x
  2. Step 2: Convert to fraction form
    128,555,528.12/177,417,570.02 = 72,810,865.06/x
  3. Step 3: Cross multiply
    128,555,528.12x = 177,417,570.02 × 72,810,865.06
  4. Step 4: Simplify right side
    128,555,528.12x = 12,917,926,749,999,322
  5. Step 5: Solve for x
    x = 12,917,926,749,999,322/128,555,528.12
  6. Step 6: Final answer
    x = 100,485,190.63

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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.