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Finding the Fourth Proportional to 81,368.34, 112,192.65 and 65,222.70

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Solution

The fourth proportional to 81,368.34, 112,192.65 and 65,222.70 is: 89,930.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,368.34 : 112,192.65 = 65,222.70 : x
  2. Step 2: Convert to fraction form
    81,368.34/112,192.65 = 65,222.70/x
  3. Step 3: Cross multiply
    81,368.34x = 112,192.65 × 65,222.70
  4. Step 4: Simplify right side
    81,368.34x = 7,317,507,553.16
  5. Step 5: Solve for x
    x = 7,317,507,553.16/81,368.34
  6. Step 6: Final answer
    x = 89,930.65

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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.