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Finding the Fourth Proportional to 223,415.53, 308,312.86 and 121,440.98

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Solution

The fourth proportional to 223,415.53, 308,312.86 and 121,440.98 is: 167,588.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,415.53 : 308,312.86 = 121,440.98 : x
  2. Step 2: Convert to fraction form
    223,415.53/308,312.86 = 121,440.98/x
  3. Step 3: Cross multiply
    223,415.53x = 308,312.86 × 121,440.98
  4. Step 4: Simplify right side
    223,415.53x = 37,441,815,865.00
  5. Step 5: Solve for x
    x = 37,441,815,865.00/223,415.53
  6. Step 6: Final answer
    x = 167,588.24

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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.