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Finding the Fourth Proportional to 171,554.55, 257,047.30 and 121,385.98

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Solution

The fourth proportional to 171,554.55, 257,047.30 and 121,385.98 is: 181,877.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,554.55 : 257,047.30 = 121,385.98 : x
  2. Step 2: Convert to fraction form
    171,554.55/257,047.30 = 121,385.98/x
  3. Step 3: Cross multiply
    171,554.55x = 257,047.30 × 121,385.98
  4. Step 4: Simplify right side
    171,554.55x = 31,201,938,416.85
  5. Step 5: Solve for x
    x = 31,201,938,416.85/171,554.55
  6. Step 6: Final answer
    x = 181,877.65

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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.