Home / 85,407,813.97-128,111,679.95-20,711,608.18

Finding the Fourth Proportional to 85,407,813.97, 128,111,679.95 and 20,711,608.18

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Solution

The fourth proportional to 85,407,813.97, 128,111,679.95 and 20,711,608.18 is: 31,067,402.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,407,813.97 : 128,111,679.95 = 20,711,608.18 : x
  2. Step 2: Convert to fraction form
    85,407,813.97/128,111,679.95 = 20,711,608.18/x
  3. Step 3: Cross multiply
    85,407,813.97x = 128,111,679.95 × 20,711,608.18
  4. Step 4: Simplify right side
    85,407,813.97x = 2,653,398,917,982,124.50
  5. Step 5: Solve for x
    x = 2,653,398,917,982,124.50/85,407,813.97
  6. Step 6: Final answer
    x = 31,067,402.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.