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Finding the Fourth Proportional to 103,288.65, 154,920.68 and 28,416.41

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Solution

The fourth proportional to 103,288.65, 154,920.68 and 28,416.41 is: 42,621.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,288.65 : 154,920.68 = 28,416.41 : x
  2. Step 2: Convert to fraction form
    103,288.65/154,920.68 = 28,416.41/x
  3. Step 3: Cross multiply
    103,288.65x = 154,920.68 × 28,416.41
  4. Step 4: Simplify right side
    103,288.65x = 4,402,288,643.67
  5. Step 5: Solve for x
    x = 4,402,288,643.67/103,288.65
  6. Step 6: Final answer
    x = 42,621.22

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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.