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Finding the Fourth Proportional to 81,364.26, 112,187.01 and 65,218.68

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Solution

The fourth proportional to 81,364.26, 112,187.01 and 65,218.68 is: 89,925.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,364.26 : 112,187.01 = 65,218.68 : x
  2. Step 2: Convert to fraction form
    81,364.26/112,187.01 = 65,218.68/x
  3. Step 3: Cross multiply
    81,364.26x = 112,187.01 × 65,218.68
  4. Step 4: Simplify right side
    81,364.26x = 7,316,688,705.35
  5. Step 5: Solve for x
    x = 7,316,688,705.35/81,364.26
  6. Step 6: Final answer
    x = 89,925.09

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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.