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Finding the Fourth Proportional to 165,783.45, 248,748.68 and 86,878.92

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Solution

The fourth proportional to 165,783.45, 248,748.68 and 86,878.92 is: 130,356.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,783.45 : 248,748.68 = 86,878.92 : x
  2. Step 2: Convert to fraction form
    165,783.45/248,748.68 = 86,878.92/x
  3. Step 3: Cross multiply
    165,783.45x = 248,748.68 × 86,878.92
  4. Step 4: Simplify right side
    165,783.45x = 21,611,016,669.83
  5. Step 5: Solve for x
    x = 21,611,016,669.83/165,783.45
  6. Step 6: Final answer
    x = 130,356.90

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1.5x scale

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.