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Finding the Fourth Proportional to 101,486.66, 140,004.86 and 65,688.17

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Solution

The fourth proportional to 101,486.66, 140,004.86 and 65,688.17 is: 90,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,486.66 : 140,004.86 = 65,688.17 : x
  2. Step 2: Convert to fraction form
    101,486.66/140,004.86 = 65,688.17/x
  3. Step 3: Cross multiply
    101,486.66x = 140,004.86 × 65,688.17
  4. Step 4: Simplify right side
    101,486.66x = 9,196,662,016.04
  5. Step 5: Solve for x
    x = 9,196,662,016.04/101,486.66
  6. Step 6: Final answer
    x = 90,619.42

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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.