Home / 128,555,588.61-177,417,653.42-72,810,925.56

Finding the Fourth Proportional to 128,555,588.61, 177,417,653.42 and 72,810,925.56

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Solution

The fourth proportional to 128,555,588.61, 177,417,653.42 and 72,810,925.56 is: 100,485,274.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,588.61 : 177,417,653.42 = 72,810,925.56 : x
  2. Step 2: Convert to fraction form
    128,555,588.61/177,417,653.42 = 72,810,925.56/x
  3. Step 3: Cross multiply
    128,555,588.61x = 177,417,653.42 × 72,810,925.56
  4. Step 4: Simplify right side
    128,555,588.61x = 12,917,943,555,829,444
  5. Step 5: Solve for x
    x = 12,917,943,555,829,444/128,555,588.61
  6. Step 6: Final answer
    x = 100,485,274.08

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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.