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Finding the Fourth Proportional to 148,770.55, 205,303.12 and 81,702.55

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Solution

The fourth proportional to 148,770.55, 205,303.12 and 81,702.55 is: 112,749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,770.55 : 205,303.12 = 81,702.55 : x
  2. Step 2: Convert to fraction form
    148,770.55/205,303.12 = 81,702.55/x
  3. Step 3: Cross multiply
    148,770.55x = 205,303.12 × 81,702.55
  4. Step 4: Simplify right side
    148,770.55x = 16,773,788,426.96
  5. Step 5: Solve for x
    x = 16,773,788,426.96/148,770.55
  6. Step 6: Final answer
    x = 112,749.39

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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.