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Finding the Fourth Proportional to 60,428.70, 90,610.65 and 25,328.70

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Solution

The fourth proportional to 60,428.70, 90,610.65 and 25,328.70 is: 37,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,428.70 : 90,610.65 = 25,328.70 : x
  2. Step 2: Convert to fraction form
    60,428.70/90,610.65 = 25,328.70/x
  3. Step 3: Cross multiply
    60,428.70x = 90,610.65 × 25,328.70
  4. Step 4: Simplify right side
    60,428.70x = 2,295,049,970.66
  5. Step 5: Solve for x
    x = 2,295,049,970.66/60,428.70
  6. Step 6: Final answer
    x = 37,979.47

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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.