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Finding the Fourth Proportional to 112,809.72, 169,161.48 and 65,438.28

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Solution

The fourth proportional to 112,809.72, 169,161.48 and 65,438.28 is: 98,126.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,809.72 : 169,161.48 = 65,438.28 : x
  2. Step 2: Convert to fraction form
    112,809.72/169,161.48 = 65,438.28/x
  3. Step 3: Cross multiply
    112,809.72x = 169,161.48 × 65,438.28
  4. Step 4: Simplify right side
    112,809.72x = 11,069,636,293.45
  5. Step 5: Solve for x
    x = 11,069,636,293.45/112,809.72
  6. Step 6: Final answer
    x = 98,126.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.