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Finding the Fourth Proportional to 98,367.12, 135,802.56 and 64,930.32

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Solution

The fourth proportional to 98,367.12, 135,802.56 and 64,930.32 is: 89,640.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,367.12 : 135,802.56 = 64,930.32 : x
  2. Step 2: Convert to fraction form
    98,367.12/135,802.56 = 64,930.32/x
  3. Step 3: Cross multiply
    98,367.12x = 135,802.56 × 64,930.32
  4. Step 4: Simplify right side
    98,367.12x = 8,817,703,677.62
  5. Step 5: Solve for x
    x = 8,817,703,677.62/98,367.12
  6. Step 6: Final answer
    x = 89,640.76

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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.