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Finding the Fourth Proportional to 228,412.55, 315,210.04 and 123,636.47

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Solution

The fourth proportional to 228,412.55, 315,210.04 and 123,636.47 is: 170,618.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,412.55 : 315,210.04 = 123,636.47 : x
  2. Step 2: Convert to fraction form
    228,412.55/315,210.04 = 123,636.47/x
  3. Step 3: Cross multiply
    228,412.55x = 315,210.04 × 123,636.47
  4. Step 4: Simplify right side
    228,412.55x = 38,971,456,654.16
  5. Step 5: Solve for x
    x = 38,971,456,654.16/228,412.55
  6. Step 6: Final answer
    x = 170,618.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.