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Finding the Fourth Proportional to 45,307.72, 67,939.50 and 19,005.40

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Solution

The fourth proportional to 45,307.72, 67,939.50 and 19,005.40 is: 28,498.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,307.72 : 67,939.50 = 19,005.40 : x
  2. Step 2: Convert to fraction form
    45,307.72/67,939.50 = 19,005.40/x
  3. Step 3: Cross multiply
    45,307.72x = 67,939.50 × 19,005.40
  4. Step 4: Simplify right side
    45,307.72x = 1,291,217,373.30
  5. Step 5: Solve for x
    x = 1,291,217,373.30/45,307.72
  6. Step 6: Final answer
    x = 28,498.84

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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.