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Finding the Fourth Proportional to 116,987.15, 161,443.82 and 65,999.71

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Solution

The fourth proportional to 116,987.15, 161,443.82 and 65,999.71 is: 91,080.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,987.15 : 161,443.82 = 65,999.71 : x
  2. Step 2: Convert to fraction form
    116,987.15/161,443.82 = 65,999.71/x
  3. Step 3: Cross multiply
    116,987.15x = 161,443.82 × 65,999.71
  4. Step 4: Simplify right side
    116,987.15x = 10,655,244,164.07
  5. Step 5: Solve for x
    x = 10,655,244,164.07/116,987.15
  6. Step 6: Final answer
    x = 91,080.47

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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.