Home / 81,146,932-121,727,482.80-20,562,660.16

Finding the Fourth Proportional to 81,146,932, 121,727,482.80 and 20,562,660.16

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Solution

The fourth proportional to 81,146,932, 121,727,482.80 and 20,562,660.16 is: 30,845,785.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,146,932 : 121,727,482.80 = 20,562,660.16 : x
  2. Step 2: Convert to fraction form
    81,146,932/121,727,482.80 = 20,562,660.16/x
  3. Step 3: Cross multiply
    81,146,932x = 121,727,482.80 × 20,562,660.16
  4. Step 4: Simplify right side
    81,146,932x = 2,503,040,860,948,645
  5. Step 5: Solve for x
    x = 2,503,040,860,948,645/81,146,932
  6. Step 6: Final answer
    x = 30,845,785.53

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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.