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Finding the Fourth Proportional to 218,985.48, 328,449.84 and 69,240.84

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Solution

The fourth proportional to 218,985.48, 328,449.84 and 69,240.84 is: 103,852.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,985.48 : 328,449.84 = 69,240.84 : x
  2. Step 2: Convert to fraction form
    218,985.48/328,449.84 = 69,240.84/x
  3. Step 3: Cross multiply
    218,985.48x = 328,449.84 × 69,240.84
  4. Step 4: Simplify right side
    218,985.48x = 22,742,142,819.47
  5. Step 5: Solve for x
    x = 22,742,142,819.47/218,985.48
  6. Step 6: Final answer
    x = 103,852.29

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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.