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Finding the Fourth Proportional to 45,307.60, 67,939.62 and 19,005.28

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Solution

The fourth proportional to 45,307.60, 67,939.62 and 19,005.28 is: 28,498.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,307.60 : 67,939.62 = 19,005.28 : x
  2. Step 2: Convert to fraction form
    45,307.60/67,939.62 = 19,005.28/x
  3. Step 3: Cross multiply
    45,307.60x = 67,939.62 × 19,005.28
  4. Step 4: Simplify right side
    45,307.60x = 1,291,211,501.19
  5. Step 5: Solve for x
    x = 1,291,211,501.19/45,307.60
  6. Step 6: Final answer
    x = 28,498.78

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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.