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Finding the Fourth Proportional to 103,264.64, 154,900.75 and 28,390.65

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Solution

The fourth proportional to 103,264.64, 154,900.75 and 28,390.65 is: 42,587.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,264.64 : 154,900.75 = 28,390.65 : x
  2. Step 2: Convert to fraction form
    103,264.64/154,900.75 = 28,390.65/x
  3. Step 3: Cross multiply
    103,264.64x = 154,900.75 × 28,390.65
  4. Step 4: Simplify right side
    103,264.64x = 4,397,732,977.99
  5. Step 5: Solve for x
    x = 4,397,732,977.99/103,264.64
  6. Step 6: Final answer
    x = 42,587.02

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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.