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Finding the Fourth Proportional to 165,748.80, 248,428.80 and 86,822.40

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Solution

The fourth proportional to 165,748.80, 248,428.80 and 86,822.40 is: 130,131.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,748.80 : 248,428.80 = 86,822.40 : x
  2. Step 2: Convert to fraction form
    165,748.80/248,428.80 = 86,822.40/x
  3. Step 3: Cross multiply
    165,748.80x = 248,428.80 × 86,822.40
  4. Step 4: Simplify right side
    165,748.80x = 21,569,184,645.12
  5. Step 5: Solve for x
    x = 21,569,184,645.12/165,748.80
  6. Step 6: Final answer
    x = 130,131.77

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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.