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Finding the Fourth Proportional to 220,017.60, 330,112.80 and 86,875.20

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Solution

The fourth proportional to 220,017.60, 330,112.80 and 86,875.20 is: 130,346.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,017.60 : 330,112.80 = 86,875.20 : x
  2. Step 2: Convert to fraction form
    220,017.60/330,112.80 = 86,875.20/x
  3. Step 3: Cross multiply
    220,017.60x = 330,112.80 × 86,875.20
  4. Step 4: Simplify right side
    220,017.60x = 28,678,615,522.56
  5. Step 5: Solve for x
    x = 28,678,615,522.56/220,017.60
  6. Step 6: Final answer
    x = 130,346.92

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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.