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Finding the Fourth Proportional to 103,218.84, 154,828.50 and 28,340.01

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Solution

The fourth proportional to 103,218.84, 154,828.50 and 28,340.01 is: 42,510.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,218.84 : 154,828.50 = 28,340.01 : x
  2. Step 2: Convert to fraction form
    103,218.84/154,828.50 = 28,340.01/x
  3. Step 3: Cross multiply
    103,218.84x = 154,828.50 × 28,340.01
  4. Step 4: Simplify right side
    103,218.84x = 4,387,840,322.44
  5. Step 5: Solve for x
    x = 4,387,840,322.44/103,218.84
  6. Step 6: Final answer
    x = 42,510.07

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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.