Home / 128,555,588.38-177,417,653.10-72,810,925.31

Finding the Fourth Proportional to 128,555,588.38, 177,417,653.10 and 72,810,925.31

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Solution

The fourth proportional to 128,555,588.38, 177,417,653.10 and 72,810,925.31 is: 100,485,273.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,588.38 : 177,417,653.10 = 72,810,925.31 : x
  2. Step 2: Convert to fraction form
    128,555,588.38/177,417,653.10 = 72,810,925.31/x
  3. Step 3: Cross multiply
    128,555,588.38x = 177,417,653.10 × 72,810,925.31
  4. Step 4: Simplify right side
    128,555,588.38x = 12,917,943,488,710,092
  5. Step 5: Solve for x
    x = 12,917,943,488,710,092/128,555,588.38
  6. Step 6: Final answer
    x = 100,485,273.74

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1.5x scale

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.