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Finding the Fourth Proportional to 74,913.80, 112,370.70 and 19,509.80

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Solution

The fourth proportional to 74,913.80, 112,370.70 and 19,509.80 is: 29,264.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,913.80 : 112,370.70 = 19,509.80 : x
  2. Step 2: Convert to fraction form
    74,913.80/112,370.70 = 19,509.80/x
  3. Step 3: Cross multiply
    74,913.80x = 112,370.70 × 19,509.80
  4. Step 4: Simplify right side
    74,913.80x = 2,192,329,882.86
  5. Step 5: Solve for x
    x = 2,192,329,882.86/74,913.80
  6. Step 6: Final answer
    x = 29,264.70

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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.