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Finding the Fourth Proportional to 69,921.34, 105,409.10 and 65,411.26

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Solution

The fourth proportional to 69,921.34, 105,409.10 and 65,411.26 is: 98,609.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,921.34 : 105,409.10 = 65,411.26 : x
  2. Step 2: Convert to fraction form
    69,921.34/105,409.10 = 65,411.26/x
  3. Step 3: Cross multiply
    69,921.34x = 105,409.10 × 65,411.26
  4. Step 4: Simplify right side
    69,921.34x = 6,894,942,046.47
  5. Step 5: Solve for x
    x = 6,894,942,046.47/69,921.34
  6. Step 6: Final answer
    x = 98,609.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.