Home / 86,746.02-129,759.08-81,431.61

Finding the Fourth Proportional to 86,746.02, 129,759.08 and 81,431.61

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Solution

The fourth proportional to 86,746.02, 129,759.08 and 81,431.61 is: 121,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,746.02 : 129,759.08 = 81,431.61 : x
  2. Step 2: Convert to fraction form
    86,746.02/129,759.08 = 81,431.61/x
  3. Step 3: Cross multiply
    86,746.02x = 129,759.08 × 81,431.61
  4. Step 4: Simplify right side
    86,746.02x = 10,566,489,902.76
  5. Step 5: Solve for x
    x = 10,566,489,902.76/86,746.02
  6. Step 6: Final answer
    x = 121,809.51

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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.