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Finding the Fourth Proportional to 98,212.82, 147,392.60 and 66,547.80

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Solution

The fourth proportional to 98,212.82, 147,392.60 and 66,547.80 is: 99,871.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,212.82 : 147,392.60 = 66,547.80 : x
  2. Step 2: Convert to fraction form
    98,212.82/147,392.60 = 66,547.80/x
  3. Step 3: Cross multiply
    98,212.82x = 147,392.60 × 66,547.80
  4. Step 4: Simplify right side
    98,212.82x = 9,808,652,933.54
  5. Step 5: Solve for x
    x = 9,808,652,933.54/98,212.82
  6. Step 6: Final answer
    x = 99,871.42

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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.