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Finding the Fourth Proportional to 223,390.41, 308,281.14 and 121,415.88

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Solution

The fourth proportional to 223,390.41, 308,281.14 and 121,415.88 is: 167,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,390.41 : 308,281.14 = 121,415.88 : x
  2. Step 2: Convert to fraction form
    223,390.41/308,281.14 = 121,415.88/x
  3. Step 3: Cross multiply
    223,390.41x = 308,281.14 × 121,415.88
  4. Step 4: Simplify right side
    223,390.41x = 37,430,225,900.50
  5. Step 5: Solve for x
    x = 37,430,225,900.50/223,390.41
  6. Step 6: Final answer
    x = 167,555.20

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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.