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Finding the Fourth Proportional to 99,307.40, 148,932.30 and 40,123.40

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Solution

The fourth proportional to 99,307.40, 148,932.30 and 40,123.40 is: 60,173.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,307.40 : 148,932.30 = 40,123.40 : x
  2. Step 2: Convert to fraction form
    99,307.40/148,932.30 = 40,123.40/x
  3. Step 3: Cross multiply
    99,307.40x = 148,932.30 × 40,123.40
  4. Step 4: Simplify right side
    99,307.40x = 5,975,670,245.82
  5. Step 5: Solve for x
    x = 5,975,670,245.82/99,307.40
  6. Step 6: Final answer
    x = 60,173.46

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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.